The point is that involving more humans in the moderation decisions at YouTube does not guarantee nor is there any evidence to suggest, that it would result in better moderation.
Somebody with the technical and industry knowledge to know that talking about security vulnerabilities like this shouldn't be removed can probably find a better job that YouTube video moderation.
There's a very wide chasm between "an AI decided" or "someone spent 20 seconds on it", and "we hired an expert in every possible field and they thoroughly research the facts at hand before making a decision".
The latter is obviously not feasible, but there are many options in between that will give markedly better outcomes than the status quo while not making YT moderation economically infeasible.
I'll settle for "Google makes a well-informed decision and will communicate the weighted pros and cons that led to that decision."