@Gargron Think about an expert, maybe a medical doctor who writes about the results of a study she made.
You know, she has no interest on getting my opinion on that (a reply) as I have nothing to contribute here. It would just be spam to her.
BUT I would like to discuss her results with my audience -> Perfectly valid use case for quoted toots.

You shouldn't take this feature from as just because it also can be used for no good.