would I pay $500 for a TPM key I can use to "attest" my hacked version of Chromium that removes ads? hell yes
would cheaters pay $500 for a TPM key to bypass valorant anti-cheat? hell yes (they do already)
would spammers pay $500 to spam Google?
and so on
ultimately attestation to control the user (vs. protect them) sows the seeds of its own demise