But staying quiet and letting what is really a very pernicious reality-denying cohort have their way and convince young people they are asexual, rather than just not ready for sex for any of a multitude of perfectly normal reasons, is not neutral.
I know I'm a bit of an outlier, but I didn't really have any sexual feelings till I was in my 20s. I often wondered why, but I'm glad I didn't have anyone telling me I was asexual and should be proud.
I think a lot of teenagers probably feel like everyone else is gagging for it all the time, and that if they're not, then something is different about them and needs a name.
I never detect any malice from JKR at all. I do think she's very perceptive and is good at seeing future outcomes and consequences of things where others just see the surface and say "That's mean, be kind, it's not hurting anyone."