Well, if inclusiveness is your issue then how do other sexual deviations contribute to society? Gays might give a lot of money to politicians, but taxpayers just sent billions of dollars to fight AIDS in Africa, not to mention the zillions they spend fighting it and other bedroom acquired diseases in this country. Don't even get me started on the "education" funded by taxpayers. I'll pass on contributions like that.
If you mean contributions in the arts, what does that have to do with how they have sex? Absolutely nothing.