Its not about quote posts. It is more than that. I think it is the ease of finding those you interacted with before. It is also much more active with celebrities, be they journalists or entertainment.
Functionality lacks there, so it is not 'better'. (no edit function for example.)
Though the ability to remove your post **from** a post quote and prevent anyone from seeing the comment is extremely popular.
People want what they liked before and bsky gives them that.