I think you're looking at it somewhat backwards. Teens are welcome to experiment with identity - that's what teens do and have always done - but I know a shocking number of adults who didn't truly understand their own gender identity until well into their 30s, 40s, even 50s. Part of the reason for that is that without the internet, there was no place to find discussion about it beyond the typical binaries.

I remember many peers going HARD into goth or punk territory as teens, and most went on to become a much more whole and complex version of themselves as adults with that goth or punk side informing but not dominating their identity. They cherish it though, for what it gives them emotionally, psychologically, and aesthetically.

With a richer available expression of gender and sexuality now available, I suspect it's reasonable to expect that many teens will lean into it to the same degree, but in this case understanding that gender and sexuality are both spectrums will help them feel like more complete versions of themselves later in life.

I wish my peers (and older generations) had access to this when they were younger, because it would have saved them decades of confusion and suffering.