At risk of shedding spergillus spores everywhere: I blame Harry Potter for the whole troons thing.
It's a fantasy where to discover your new friends and powers you have to be (usually) cut off from your family, and assigned a quality (a house) that's absolutely inherent and shapes who you are for life, and some of them are good, and one of them is bad.
So of course none of them want to be House Hetero, it's boring and the baddies are all House Hetero. So some of them choose House Troon, where you don't actually have to fuck anyone you don't fancy (Unlike House Homo), and thanks to the spell of "EW GROSS TRUSCUM" you don't have to have anything cut off or take any hormones that fuck with your system either, it's just a cool word that lets you get away with nonsense.