This would cut into margins, but maybe it is not possible to run hyper scale companies only managed by a couple of engineers.
And maybe we should not accept that profit seeking people want to do that anyways.
It wouldn't cut into margins, it would make YouTube wildly unprofitable, with no viable path to monetization that would ever pay for the support burden.
I realize that some on HN—it sounds like you included—are perfectly happy to argue that if a company can't provide human customer support to every one of their users then that company shouldn't exist, but most of YouTube's users would fervently disagree.
There is a segment on HN, it sounds like you are included, who believes that is is OK to entirely defer to algorithmic governance without any legal oversigt.
At their scale there will always be high profile stories like this unless and until they spend enough to support every single user who runs into problems with their automated systems. Spending that much is completely cost prohibitive, so we should never expect to reach a point where we stop seeing stories like this.
For that scale, you're looking at an army of tens of thousands of customer reps - on top of however many they already have. I don't know how Google does it, but FB has a number of subsidiaries or contracted companies across the world that spend their days doing content moderation.