I mean Prides are still open to cis and hetero folk in the same way like a Italian culture festival is open to non-Italians. The key component is that queerness has a culture with it's own traditions, history, art, coded language and etticate in much the same way an ethnicity does the only difference is that it is not passed along by virtue of birth. The nature of Prides as being in opposition to generational suppression and genocide just makes them a bit louder and in your face.