[esrauch]

Every system has some type 1 errors and some type 2 errors. The notion that they could just have neither if they cared a little more is just kind of absurd and doesn't at all reflect the messiness of the world we live in.

Even if Google paid Harvard JDs to read every DMCA notice (of which there literally aren't enough of them), even then they would sometimes be tricked by adversaries and sometimes incorrectly think someone was an adversary some of the time.

I worked at YouTube in the past and I can tell you copyright ownership isn't even fully known by the lawyers. Concretely there's a lot of major songs where the sum of major companies affirming they have partial ownership sums to more than 100% or less than 100%. Literally even the copyright holders don't actually know what they themselves own without lots of errors, and that's without getting into a system that has to try to combat adversarial / bad-faith actors.