There is a difference between assuming an individual is heterosexual if you know nothing about them, and assuming everyone is heterosexual, and hence pretending there are no homosexuals (and others). It is wrong, and damaging to never show or talk about homosexuals, since you're pretending they don't exist.
For example, the majority of the USA is white, and not black. It used to be the case that all TV shows would have fully white casts, and never really have black characters. Sometimes people make this mistake when dealing with homosexuals (etc.)
For example, the majority of the USA is white, and not black. It used to be the case that all TV shows would have fully white casts, and never really have black characters. Sometimes people make this mistake when dealing with homosexuals (etc.)