Google made it very clear years ago that they shouldn't be trusted with anything irreplaceable/that would cause major problems if you lost access.

Once it became clear that they'd shifted from "crappy customer service" to (IMNSHO) "we fetishize the complete absence of customer service" it became dangerous to depend on them. Really, what's the worst that could happen? Maybe someone spams emojis in live chat on a game livestream at the request of the streamer on a personal account, it gets banned for abuse, Google recognizes that it's linked to other services and locks down everything? But that's so unrealistic I'm sure it could never happen.

It's not like they also have the ability to identify links between multiple accounts accessed by the same person and have automated processes that might stomp the associated accounts as well. Why, that would probably require something like allowing poorly-understood automated agents to take actions on their own!