Then why bother?
You don't see "celibacy pride" marches in Vatican City, or "Mestizo pride" marches in Mexico, or "potato farmer pride" marches in Idaho, do you?
No. Why not? Becuase everybody is part of the group, and there's no point. But you'll still see "gay pride" marches in Frisco.
Why?
All I can think of is what I said before: it looks very much like it was done to attract attention, to make a spectacle, to provide a photo opportunity.
They're trying to make a noise, to stri things up, to get in somebody's face, push the envelope, offend somebody, in order to advance their agenda.
Which is their right, of course, but it doesn't mean that everybody in the world is just going to roll over, play dead, and give them everything they demand. Real life just doesn't work that way.