Largest reason is that trans, homosexual and bisexual people don't have to fear being killed or shunned by their families or in school any more. (Yes, in reality they do have to fear discrimination, but soxiety as a large has gotten way, way more open in the last 30 years!)
Trans people were known in ancient Greece ffs, it's mostly thanks to the Catholic church and its "morals" that we ended up with imprisoning people for being gay or trans.