Google doesn’t just randomly grow a set of morals and balls after a decade of silence about similar behavior by/on Twitter, fb, yikyak, tiktok, Snapchat, etc.
Hell, even encouragement if you count things like planning terrorist attacks and successfully killing/harming dozens on WhatsApp, and not immediately banning the application, as well as probably every communication system available on the phone.
Not being great at enforcing rules on social media is not on the same level as intending not to have those rules.
Equating private with public messaging is ridiculous. Not sure how laws are in the US, but when doing support here in germany we had to have private in-game messages reported by a participant before we were even allowed to look at them. The company obviously had a much easier time shaping the atmosphere in the public forum.
And if you only care about outcomes like never having a terrorist attack... well, I don't see how this could ever happen without in-depth control by government or the like. China-style is probably the closest example we have, and that's not a trade-off i would want to make.