That's not true because soon in the future scientists will be able to get man the real like body of a women and even have a baby and the same with get women to be able to produce sperm. Gays having sex will help the society from sadness and suicide rates and also rebel against those that are against gay sex it could lead to killing and many other things. The part to getting gays to become right is very unlikely and it would cause more problems than good for society and also it's like trying to get a straight christian to turn gay and not believe in God.
Do you support neutering and spaying because they can't give consent to that but we do it anyway but let me guss you will say there is a difference because "neutering is not as bad as rape" so before you say that, there are still both wrong and until you take action at banning neutering and spaying your just a hypocritical.
And anyway animals can give consent and your are getting yourself into a argument that you don't even know much about like I do.