Maybe not in this particular case (though I'm not sure about that), but they certainly do care what people post (irrespective of their ToS). Remember the "communist bandit"/"50-cent party" fiasco? [1][2]

Also, their terms of service are not divine unambiguous laws. They makes the the rules themselves, and enforce them as selectively as they please.

[1]: https://news.ycombinator.com/item?id=23223219

[2]: https://reclaimthenet.org/youtube-was-censoring-china-propag...