Earlier quoted context omitted.
The big question that this viewpoint misses is what to do with fears that certain things "turn people gay" and the flip side of that fear: that the straight community might use successful conversion therapy to eliminate the gay community. All of a sudden both of those camps have ammunition for their points. Saying that it's "genetically determined" (or at least innately determined) very nicely sidestepped that. To th…
> Saying that it's "genetically determined" (or at least innately determined) very nicely sidestepped that But nature does not care whether it’s convenient or not. If this gets disproven, then what?
Taken at face value that is a far stronger statement than "nature does not care about convenience." This is saying "in this instance, we should not care about the truth of nature. There is no policy value to be attained by finding out the truth of the matter."
We certainly should not let convenience dictate our policies. That a statement happens to be convenient should not be why we accept its truth. But that's a different statement than the parent comment. All I'm trying to explain is why certain segments of the population would believe it valuable to figure out whether innateness is true or not.
EDIT:
> If this gets disproven, then what?
There are significant policy repercussions if this were to be conclusively disproven (the unlikely extreme would be if it turned out that sexual orientation was entirely mutable given the right external situation). In education alone, arguments of whether certain curricula or environments "turn people gay" or "turn people straight" would take on a far more urgent tone for large swaths of the population.
Could a local government mandate exposure to effective gay conversion therapy in a school environment (just exposure, not forcing a course of therapy)?
Culturally whether conservative parents would allow their children to play with gay children or children from gay families would likewise take on an additional urgency.
Many issues of policy have basically been decided on the assumption of "whether you like homosexuality or not, it's immutable so you may as well as treat it as if it were to stay," which is already controversial enough. If that's not true, then policy must grapple with the question of whether sexual orientation is an intrinsically valuable thing (and given that mainstream society is predominantly heterosexual, that would inevitably morph into whether homosexuality is an intrinsically valuable thing, since I suspect most people who identify as heterosexual value their own heterosexuality), which is an even more divisive topic in the U.S.