Regarding, "It takes seconds...", "no-effort posting...", how much effort should be involved, exactly? Even trivial post may be difficult to compose for someone with poor health, disability, cognitive issues, poor comprehension of foreign language, etc.

But in reality, it is hard to believe that you actually care about effort: if I am to provide you with a "proof of work", proving that I typed all the text instead of pasting it, would you say that it is OK then, even if result is indistinguishable from copy/paste?

I have made number of posts where I accompanied video with partial transcript that you might also say is lacking "original content", but I assure you that transcribing spoken language is not a trivial effort.

For me, preparation of video for posting takes duration of the video plus some minutes (not "seconds", as I do that manually without automation) to properly tag and compose post, unless I also took notes (or partial transcript) to accompany the video. Also, because I do not repost all author's videos, some time is spent/wasted on processing videos that I decide not to share.

Another example is a grief quote that I posted recently. I had dozens of browser tabs opened with shortlisted articles. Since I have other commitments, and because this material is emotionally difficult to process, I was on and off the task for two weeks(!) carefully filtering articles through my own experience, dismissing most of them, until I was lucky to find one small fragment worth posting. Total time spent in research was up to two days(!), just to share a small quote. You have no idea of effort involved.

Let aside questions why it should be difficult to post, and what is presumably improved if poster dose more work...

So what if "original content" was created by someone else? Most of mankind's knowledge is second-hand. Not everyone should be writing books or making music. It is OK to point out good content. Friends do that all the time, teachers do that all the time, etc. The point is not to re-create knowledge from scratch or reinvent the wheel but to filter and process information. Are you against sharing? If you learned about something good, why mentioning it to your followers should be forbidden? Your output does not always enrich someone else's content.