From the latest Fediverse Report, about Mastodon quote posts:

Mastodon’s concern regarding the potential for harm with dunking does need some context however, researcher Hilda Bastian has a highly detailed overview of over 30 studies on quote posts on Twitter and their impact. Bastian notes: “There’s conflicting evidence on whether QTs increase or decrease incivility, and whatever effect there is, it doesn’t seem to be major.”

I think this dunking is real, but there are many other problems with social media that Mastodon does not attempt to address. Not sure quote posts are make or break.