Your question was Why should no content should ever be taken down automatically just because a bunch of random people report it.
It's because the random people reporting it can't be trusted to be acting honestly. Without a human in the loop, the automated system becomes a tool for cyberbullies, and harms the very users you intend to protect. The foregone conclusion, thus, is that a fully-automated system will do more harm for the user-base than good.
> The foregone conclusion, thus, is that a fully-automated system will do more harm for the user-base than good.
This is not an answer, it is just lazy circular reasoning. "Automated take downs should not be used because they do more harm than good." Yes we have already established that is your assertion, I am asking for how you were able to conclude that.