Hello. Interesting question, but I do apologize on my end for not being able to quite understand what you mean. As such, definitely feel free to send in a follow-up question if my current answer remains lacking. (And to note, I am in “dead week” of university and soon to have finals. Thus, I will keep my answers here relatively short–or so I say. Readers will know this is basically a blatant lie that I say in hopes of actually being true to it when I never am.)
The way I personally understand this question is essentially what I like to coin as: the “Casual Question.” Basically, then, the question of how I feel about people who are simply casual fans of K-Pop–and I include both aspects of social and musical (and perhaps within “musical,” we can generalize it further as “entertainment.”)
In short: there is never an issue with simply just being a casual fan and “reacting,” as you say, to K-Pop. If we are talking in the sense of culture, as I always have to stress with readers, K-Pop is simply Korean pop culture; in other words, there is nothing “special” with it at all. Especially as a majority of readers are international fans, perhaps I might have unintentionally given off false ideas that K-Pop is supposedly “special” and that it needs to be critically enjoyed versus casually. As said, the mentioned idea is false: by me encouraging readers to be critical consumers of K-Pop–musically and socially–I mean that in the sense of pop culture in general. I do not wish to say nor hold K-Pop as some superior form of pop culture; that is absolutely not just false, but absolutely horrendous and ethnocentric for me to ever encourage. (And on another note, this is why I will only ever review Korean and Chinese music; while certain identical genres do exist in many cultures, there are some cultural musical differences and I acknowledge that I have a bias with that said cultural musical differences. Thus, it would never be fair for me to review a song outside of Korean or Chinese music as it would be biased. What apparently is an amazing composition decision in for example an American Pop song might be, to my cultural lens of Korean and Chinese music, questionable and weak.)
Overall, in the sense of culture, fans who merely “react” and casually listen to K-Pop is not a problem at all, and I want to make that explicitly clear for readers. It is not, for example, racist for one to say they just casually listen to K-Pop without concerning for the culture itself–unless, of course, genuine racist actions occur within that such as sexually objectifying Korean women or ignoring cultural differences and instead imposing one’s personal culture onto K-Pop/Korean culture. (And to not get too off-topic, I do want to address that this is one reason for why I truly dislike it when international fans greatly argue that K-Pop needs to be brought to, say, American pop culture. That idea is essentially saying Korean pop culture is its own exotic toy that fans should bring as mainstream to their own personal pop culture. While I believe in sharing music across cultures, I argue it is atrocious for one to say that the entirety of a culture’s pop culture should be “brought over.” Respect a culture’s pop culture as what it is in of itself; do not enter it in the mindset of injecting one’s own cultural background onto it. Again, this is a future topic.)
Now regarding a more general social side, this is trickier. Is it wrong to be a “casual” fan who only enjoys K-Pop for its entertainment and purposefully attempts to ignore social-related issues that occur? I personally argue that, as a human being, we all have a responsibility to care beyond the entertainment layer. Why? Because artists and idols are still humans, and because pop culture can be quite influential (and reflective of popular cultural values). For example, let us imagine there is a released music video where homosexuality is mocked–but let us pretend the music itself is great. Yes, on the entertainment side, we should praise the composition. But, as socially and ethically responsible human beings, I argue we need to be equally critical of the social side: Why is this music video mocking homosexuality or vice-versa with why does it choose to empower homosexuality? In the end, while I do strongly encourage caring for the ethical and social side to any pop culture–songs, music videos, “idol news,” etc.–it is up to readers to decide if they would care. Being a “casual” fan in this regard is something I personally disagree with, but ultimately it is up to a fan’s decision and where their own values lie.
Lastly, in terms of casually listening to music, I believe there is a somewhat recent review I wrote that discusses this. It is either TWICE’s “TT” or Apink’s “Only One,” but regardless, I am willing to summarize my take to this. I personally encourage fans to be critical listeners of music, but unlike the social aspect that has genuine consequences and high-stakes, it is not problematic in any sense if a fan only casually listens to music. Overall, how much one cares for the arts/music and enjoys being analytical in what they hear is the question to ponder. Casually listening to music is definitely not harming anyone, and despite my reviews and urge for readers to do so, I admit: I still casually listen to music. For a general example of such, there are cases where I listen to songs that I would critically render as weaker songs, but I indeed still enjoy these “weaker songs” because on a more casual take: the song is catchy, fun, and so on.
Hopefully I answered your question in the appropriate context, but as said, feel free to send in a follow-up question if this answer completely missed what you were asking. In summary, there is no issue with a fan merely reacting to K-Pop or pop culture in general, though I do certainly encourage fans to be critical of the ethical and social side to pop culture.