Enabling ADP breaks all kinds of things in Apple’s ecosystem subtly with incredibly arcane errors.

I was unable to use Apple Fitness+ on my TV due to it telling me my Watch couldn’t pair with the TV.

The problem went away when turning off ADP.

To turn off ADP required opening a support case with Apple which took three weeks to resolve, before this an attempt to turn off would just fail with no detailed error.

Other things like iCloud on the web were disabled with ADP on.

I just wanted encrypted backups, that was it.