I have credentials shared with my parents passwords managers (and others) so when they ask for help with a service I can do it remotely for the services they want help with, but not their whole password manager.

I share company passwords in an organization so I can manage user accounts for things a user needs into but doesn’t want to manage (I can change the Snowflake password but they can still login).

I share common passwords with everyone in the house (gate codes, door codes, etc). Then when they need to change, no one is bothered or needs to take action. Also, then anyone can change it and everyone who should have the new one, does.