You certainly have a point, but it is also true that societal acceptance of homosexuality does make it much easier and more likely for someone to come out. The end goal of it being completely accepted and not deemed relevant with than "...and?" response is certainly a good one, but to get there we have to first make eliminate homophobia from our society and make sure we have an environment where no-one really does feel the need to hide their sexuality. Showing open acceptance to LGBT people coming out helps towards that. It's a stepping stone, if you will, between the outright hatred of the past and the neutral acceptance of the future.