A large proportion of the homophobia that exists in society continues to stem from religious belief. Within this, the active condemnation of homosexuality is often justified as an expression of faith; a religious right where an individual is free to preach - what they perceive to be - the word of God.
What I'm saying to Sam Smith is that he might not want to be a spokesperson for gay rights, but as far as I care he doesn't really have a choice in the matter. If he wants to sit next to Katy Perry and Miley Cyrus at the VMAs, then he's going to have to face up to the fact that his words have weight to them now.
Some gay people might feel that finding a gay gene might diminish prevalent homophobia, but this is naive. Racism has not diminished because we know that blackness or whiteness is genetic. But scientists still treat us like rats in a lab and look for 'causes'. I have been told I am a lesbian because my mother smoked and drank whilst carrying me.