It was discussed here a few months ago, and is a low-grade continuing issue for some: Stadia - Google's vision for the future of gaming - #2370 by rei
Basically, since everything is under one account, violations, or perceived violations of TOS on youtube, ads, play store, can get everything banned.
So then OK, the solution is to have a different account for email vs youtube, vs adWords, but now you’re very much losing the convenience of having this one unified account. Not an issue for people who don’t engage with those parts of Google, but not something that endears them to me.