This sets a terrible precedent. For most, a phone is all or a combination of; house keys, car keys, bank cards, medical records, photo albums, etc. Giving all that up to a stranger (albeit behind a passcode) is a step backwards in security and privacy. An alternative that I have witnessed is places place your phone in a lockable bag that you then carry with you. They unlock the bag when you exit.
> Giving all that up to a stranger (albeit behind a passcode) is a step backwards in security and privacy.
putting all that on a device that you don't control and that "strangers" at apple or google can access or make changes to at any time, and without any notice to you and without any permission from you sounds like a step backwards in security and privacy.