The short answer is that the pollution is bad, but so is it’s effect of turning the frogs gay because it fucks with frog populations, which fucks with the entire food chain after a fashion.

Nothing necessarily wrong with homosexuality in any species (except maybe the ones who can only mate once, or the ones that engage in traumatic insemination where the males aren’t as equipped to deal with being on the receiving end), until it’s frequent enough to have population level impacts.