"every successful species, such as ours, has to have majority of its population straight"
Then you agree, if gay people want to correct an "informed" assumption, they've got to say something. And I suppose many gay people come up to you and say "Hello, I'm gay and my name is..."
I have no idea why you feel gay people coming out to be overbearing. Do you feel the presence of black skinned, blond haired or female people to be overbearing?