You're not wrong, but I do think that there's something to be said about Kpop being "different" and "special", but the difference doesn't lie in the music, it lies in the culture.
The reason that VK fans can so easily transition to Kpop is that the fan cultures surrounding them are so very similar, despite the music being so different. On the inverse - take "Black" American pop music for example: Musically, "Black" American pop/r&b/rap is like the mother of Kpop, as it directly inspires Kpop and sets the trends and standards for a lot of Kpop, yet you don't see a gang of Kpop fans praising too many "black" artists. Now the music from these two scenes are VERY similar, so you'd think that Kpop fans would also be naturally interested in both (and to be fair, some are, but i don't see this to be the case in general). But the cultures surrounding both scenes are so different that you don't really see a lot of cross pollination between the fanbases, despite the music being so similar.
So I do think that kpop fans genuinely enjoy the music, it's just that the music comes secondary to the culture. I think it's the culture that attracts most ppl first, and then the music is something people actually find enjoyable after. But not often the other way around. Now obviously there are ppl who are open-minded enough not to give a fuck about the cultures and will listen to anything that they like, but the impact of culture can actually be pretty profound, because culture often gives a context in which to perceive the music. And you'd be surprised how much context can influence one's taste.
I've experienced this personally many times. It was like this for me when I got into J-rock. I grew up in "black" culture where rock music was mostly considered a "white" thing, and so we didn't fuck with it like that. I didn't really listen to rock music until after I got into J-rock. Because J-rock offered a different cultural path to rock music than the stereotypical American White culture that I associated it with at the time. But after developing a true affinity for rock, I was able to go back and appreciate the rock music that I previously avoided due to cultural boundaries/ignorance.
So yeah, that's my thoughts on that. Culture affects our perception of things more than we realize. They say culture is to humans as water is to fish - so we can't always see what cultural perspective that we're operating from until after we've experienced other cultures, or until after we've swam in other waters, if you will.
But with that said, I personally think Kpop is a lot of fun. I don't listen to it or seek it out on my own, but whenever i'm exposed to it, it's always a joy. The visuals, the dances, the production - the general pomp of it all - it's all pretty exciting. So I see how ppl can enjoy it. For me, KPOP is like eating sweets tho. Like yeah, I enjoy them for sure, but too much and I'll get sick.