wyd. Being gay or trans is something very likely developmental from an extremely early stage of development. Not muh genes. It's society that's changing so you see these people more comfortable coming out and discussing it. Abuse and depression have always existed, sadly.
So there is some evidence of heritability in sexual orientation. We don't know much. But it's more complicated than genetics (presence of hormones,etc.), people w/o kids are still beneficial to group survival, & it's reductive, irresponsible, and inhumane to make claims of abuse.