> Attestation is also a security feature
I don't actually disagree with this. The auditor is a perfectly valid use of it. It's good to be able to verify cryptographically your device is running what it's supposed to.
The problem is when it transcends ownership boundaries and becomes a mechanism to exert control over things someone doesn't own, like your bank or government controlling your phone. It is one of the biggest threats to ownership worldwide.
Note also that getting "trusted" comes at the cost of other security features, such as spoofing your location securely to apps: