The searches for the causes of homosexuality, as far as I'm aware must satisfy two criteria. 1. They are determined before birth and 2. Sexual orientation is immutable after birth. This is kind of like the dogma that amyloid plaques are the only cause of Alzheimer's and specific identifiable genetic mutations are the only cause of cancer. Both have been research dead for years, yet they keep getting grant money.

Because I am a nobody hobbyist I can come up with whatever theory I want and look for evidence for it in the medical literature.

Sure this guy is a religious guy, but he's just reporting a personal experience. No credentials needed for that really.

I'm afraid if you're credulous enough to believe a guy claiming that a particular quack's "parasite cleansing" service not only cured him of 24/7 anal sex obsession (which is totally how real gay people feel) but also his friend of late stage cancer is a real life data point and not transparently false advertising for said quack's services, you're probably not in a position to cast aspersions on the quality of medical research, and not because medical research is above criticism. No, you don't need any credentials to testify that you have personally experienced parasite cleansing miraculously curing homosexuality and ailments apparently mistakenly identified as late stage cancer in YouTube video. Nor do you need to have ever been homosexual, or to have the slightest idea what's involved in cancer diagnoses.

Trust me, it's entirely possible to get funding for research into post natal causes of homosexuality and the last high profile study on genetics reached the rather unfashionable conclusion that the most obvious candidate "gay genes" not only had little explanatory power but were more to do with sexual openness in general than homosexuality per se in a blaze of publicity with no career-limiting consequences whatsoever. Please don't mistake professionals' lack of faith in the veracity of stuff like Jennifer Daniels' patient testimony for rigid adherence to their own dogmas.

You are of course free to use your time how you want, and there's value in pursuing unconventional theories, but the ability to screen out palpable nonsense is pretty fundamental to that.