Err, it's actually pretty simple: the token/certificate representing your ID (or credit card, or anything really) cannot be exfiltrated by userspace or installed kernel space apps or intercepted on the way to TPM when issued. And it cannot be duplicated.
It's the same set of requirements that are put on credit card smart chips and biometric chips in EU IDs and Passports (which are essentially also TPMs).
But sure, it's a all an evil conspiracy against general purpose computing. And they're all out to get ya. Now smash that downvote for a vote against the evil establishment.