It should be obviously that the issue with humans is the same if not worse. People already complain en masse about Google censoring all kinds of stuff. Put a human behind things and then people will demand their head for taking down controversial videos.

Their algorithm is absolutely terrible however and doesn't absolve them of allowing incredibly awful content to exist on their platform. However this is simply not an easy problem to solve when you serve such a large community and want to bend to support as much of it as possible.