Exactly, I totally agree. It sounds politically incorrect, but actually I find a lot of straight people are more accepting of bisexuality. Even though they call it the LGBT community, a lot of gay people don't accept bisexuality. They think bisexuals are liars and are in denial about being gay. You aren't accepted in the gay community if you have sex with both genders. So if you come out as bisexual you won't be accepted in the traditional gay community so it doesn't work to come out like it does for a 100% gay person.
That wouldn't be a massive generalisation or anything now, would it be?