Thanks for posting this discussion, I agree with the general consensus from the edit.

Thumbnails are annoying to deal with, and I had trouble the few times when I tried to address it in my own posts. It’s a lot more work to pull a different thumbnail and replace the autogenerated one, especially if you’re on mobile and just want to share something quickly. Still, if someone is posting low effort spam/clickbait often, I’d agree with a mod telling them to knock it off