They're maybe not the internet's "babysitters", but they are the "babysitters" of their own network infrastructure and services, and these spammer scum do abuse

They're maybe not the internet's "babysitters", but they are the "babysitters" of their own network infrastructure and services, and these spammer scum do abuse that infrastructure and waste/steal bandwidth and other resource that don't belong to them. You'd think Google would want to put a stop to that when it's gotten to a point where it's happening "at scale" and wasting large enough amounts of resource that it starts to equate to real-world dollars being lost/wasted. Sure, users bear some responsibility for not being scammed, but that doesn't mean that Google has to tolerate it happening through their services and infrastructure, especially not when their own end user license agreements for those services actively prohibit such usage.