IIN That I think K-pop fans are the worst kind of musical fanbase?

It's normal for girls of that age to be attracted to older men who are androgynous or at least boy-like enough to not seem threateningly mature in sexual terms. This is why a large part of the work of managers of pop stars from even before the time when Sinatra was a teenybopper heartthrob has been keeping the reality of these men hidden from the public. The K-Pop managers understand this very well, which is why we regularly hear stories about a pretty band member being replaced with a clone when they've done something that conflicts with their phoney image.