Earlier quoted context omitted.
Counter hypothesis. For the last several decades society put massive pressure on kids to conform to heteronormativity. With these pressures lessening more and more people are feeling empowered to explore their sexuality. Social media is absolutely involved, but we really don't know what the base rate would be in a society devoid of this kind of pressure.
This brings to mind one of my rules about conservative panics: If laws against witchcraft are removed and/or witchcraft is destigmatized and then all the sudden there appears to be an explosion of witches, the explanation is probably not that hordes of people are adopting witchcraft. I'll leave it to the reader to guess the simplest and most likely explanation.
Rule implies that it applies to past conservative moral panics. Is there a past moral panic in which lots of formerly suppressed identities suddenly expressed themselves once the moral panic was over?