If homoloveuals are a waste and a genetic dead-end, why is it possible they can be made? Surely humans's would have adapted for homoloveuality to be an impossibility. And don't talk rubbish such as it's the person's choice and not nature's, because I'm homoloveual, and I CERTAINLY didn't choose to get shunned by 70% of people, become a "genetic dead-end" as you call it (I do want children perhaps) and have people make fun of me.
Who chooses that? No one in their right mind. If nature allows it, why should you complain about it.