This is a valid concern, sadly it's only a drop in the bucket. Talking to people trying to get divorced and preparing to have their partner become an "enemy",

This is a valid concern, sadly it's only a drop in the bucket. Talking to people trying to get divorced and preparing to have their partner become an "enemy", a lot of them had their apple and google accounts managed by their partners. It was either a shared account and their partner accessed the info just logging in, or it was their own, but setup and 2FA'd by their partner who would get notified of external logins etc. And most of the account services have no protection against "yourself" logging in. The state of account management can be very dire for people who don't actively manage theirs from beginning to end. Then the complexity of some settings can make it look daunting and they just bail on the whole process.