Which makes one wonder why they pandered to the content industry with it at all. There's no requirement they make such a system, and it makes their service less desirable and usable.

Google's responsibility is to respond to DMCA notices; that's it. They have no requirement to create a Draconian copyright monitor.

(The standard response is "so the content industry would work with us!!!" Who gives a shit? Oh no, we wouldn't have any of the shitty "Vevo" channels laced with advertising without Content ID. What a terrible loss that would be.)