Exactly. Plus, all backups of the iphones on icloud are already unencrypted, so half of the phones are already indirectly unlocked.
EDIT: backups are encrypted, but apple have the keys. See below.
EDIT: backups are encrypted, but apple have the keys. See below.
So basically, they could be in clear text, it's pretty much the same.
[1]: https://www.apple.com/business/docs/iOS_Security_Guide.pdf