This is just my opinion, and let me say I understand where you're coming from, but I believe in the near future, sexuality will just not be that big of a deal. The biggest arguments I see against queerness are because of religious beliefs (i.e. Bible says it's wrong), social taboos (it's considered disgusting/immoral), stds, and parenting (can't have kids/can't raise kids right). I'll try to be quick, but a) religions are constantly adapting, and can change to believe whatever they want (i.e. The Bible says it's an abomination to wear 2 types of cloths, obviously people don't believe that anymore) b) social taboos typically change towards have more rights for more people, not less (i.e. Women's and black's rights) c) medical advancements are always in development d) you can be queer and have kids (in vitro, adopting, or even just plain, regular sex) and raise them by just being good people and surrounding them by people of all types (it takes a village to raise a kid, not just 2 straight parents).

Sorry if I made a mistake or didn't make sense, I had to type this quickly.