I think the most important part is what’s going on in the parents’ head and they’re suspecting their toddlers/children will be gay based on toy and clothing preferences, and many are actively seeking to prevent that through transition.

I agree that that's very important, and I did address that.

it can’t be denied that there are certain patterns that are much more common among kids who will grow up to be gay

I'm not convinced.

For Jazz, hasn’t Jazz made it pretty clear he likes boys? Or at least dates them? Or are we going by the fact that his sexuality itself seems to have been neutered?

He will never experience arousal, so he's just playing at what he thinks a girl should do (date boys).