homosexuality is found in every species we take the time to look.

including worms, and i seriously doubt they choose to be gay. And worms have not gone extinct because some are born gay.

Then the question is, if you are calling it a defect, what would also classify as a defect? Blue eyes are inferior as people with blue or lighter colored eyes have worse eye sight and higher rates of eye problems than those with darker eyes. Should we be screening for this?

Left handed people don't live as long as right handed people (by about a year) so should we protect these children by eliminating them in the womb or fixing them?

we should always look to maximize the genetic diversity in our species not curtail it. so gay people don't have as high a rate of having children as heterosexuals, its not like the world in underpopulated and there are more heterosexuals that do not have children than all homosexuals combined.