Why should that have been their goal? This isn't a conference about racial issues or gender issues. Should they have also made it a goal to include a token gay

Why should that have been their goal? This isn't a conference about racial issues or gender issues. Should they have also made it a goal to include a token gay speaker? But then they're discriminating against people who don't fit into the standard classification of gay and straight! There's no reason it should be a goal of a conference organizer to have a diverse collection of speakers, just to put on display how not-racist and how not-sexist they are. They should of course not discriminate against a speaker for those things, but to make it a goal to seek out diversity is perverse.