simply put, being "straight" has been the "norm" for ages. being heterosexual is accepted in the whole world. you don't see anyone being discriminated against, or kicked out, or whatever for being straight, you see it more often against those in the LGBTQ community.
there is no such thing as "heterophobia", since nobody is against the idea of being straight. since "homophobia" and similar things do exist though, that's why you have gay pride parades and things.
there is no such thing as "heterophobia", since nobody is against the idea of being straight. since "homophobia" and similar things do exist though, that's why you have gay pride parades and things.