We have substantial evidence they weren't and not a shred of proof, replicated or credible evidence they were.
To believe homosexuals were born they way the are is buy into lies being spun leftists to advance their political agenda. much like they are doing by promoting man-made global warming. Normalization of homosexuality was an objective for communists going back to 1963 in their stated goals for the US.
I don’t have any idea how someone becomes a homosexual, but since we can’t prove that people are not born that way, then I say, maybe, maybe not.