Twitter's "fact check" singles out a specific Trump tweet. It's clearly a human intervention by Twitter staff, not user generated content. The subject of Trump's tweet was a political dispute, and while Trump certainly had false statements in his tweet, that's basically par for the course on Twitter.
This raises a bunch of questions. Why is Twitter singling out Trump for his false statements? If AOC or Bernie Sanders make false or misleading statements about economics (which they frequently do), will those also receive fact checks and warning labels?
We have seen this also with the coronavirus breakout. Medium and other publishers removed posts based that were sanguine data analysis (nothing inflammatory) because they were against the prevailing media sentiment. For example this Medium post [1] was removed based on its content. It did not contain anything inflammatory, violent, or otherwise unsavory. Medium just didn't like what it said.
At what point does Twitter or Medium cease to be a neutral discussion platform, and become more like a publisher that pushes a specific narrative (like Fox News, the New York Times, CNN, etc.). They are certainly within their rights do curate/moderate their platform, but if this continues, we need to start thinking of these companies less like user driven platforms, and more like opinionated publishers.
[1] https://web.archive.org/web/20200321144004/https:/medium.com...