Women have physically labored for much of human history. Their efforts haven't been as recognized as much by historians as men's efforts have.
That's not to take away from how men have contributed, mind you. But to say that the road to capitalism is not paved with the bodies of women is false.
No, the entire comment on it's own is correct. Most content on social media is from people sharing, linking, commenting on, or remixing content found somewhere else.
The comment doesn't say anything about quality vs quantity. They're only talking about the state of social media and how it is built up.
My personal opinion on sanitation's contributions is that a lot of it is spam. I'd prefer to have people manually reposting instead of this bot-like action of reposting a lot of stuff automatically, it can make communities feel empty. But all of that is aside from the comment I replied to which is ultimately correct about social media.