Yes, but if the majority are interoperable, that raises the pressure on others to use the same event type for the same data type, unless they can prove that they have some novel use case that requires a different tactic. Which is possible.

Like, if Zapstore is using labels for ratings, I'll just use labels. I don't need to invent a new "rating kind", just to be a jerk about it. My incentive is to just go along, to retain interoperability and not preclude future use cases. That's part of the magic of Nostr.