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No, practicality does not demand "binding shitty algorithmic decisions for thee, extreme latitude for egregious errors from me." Determinations don't need to be scalable to backstop a system of back-and-forth escalating claims that keeps the incentives correct for everyone at all stages: human beats algorithm, identified human beats unidentified human (note that at this point and all subsequent points rights holders have an enormous, automatic scalability advantage), identified human with legal commitment to consequences for being incorrect beats uncommitted human, and finally bump it to the legal system if all else fails, but by now everyone has skin in the game committed to their claims so none of the disagreements will be spammy.
This is all possible, it's not even particularly difficult, but it wouldn't create a cozy relationship with big rights holders which is what youtube actually wants, so instead we get "binding shitty decisions for thee, extreme latitude for egregious errors from me."