The big companies don't want to do this basic due diligence because today at least it requires human labor, even if that human labor is "do a quick glance and check a couple boxes".
The article even points out that US laws say that things taken down for copyright infringement but are in fact Fair Use should be able to claim damages. In theory a class action lawsuit of video essayists could make a real strong case in direct, estimated demonitization losses due to spurious copyright takedown notices YouTube acted upon automatically without any Fair Use checks. I can't imagine the stress of being involved in a case like that in practice, which is probably why there isn't enough people begging to be in a class action lawsuit like that.