I could also mean that if you don’t have TPM on your computer and the OS is not in the ”allowed” list, you can’t access anything. I hope that this is not the path we will see.

Agreed. But talking in generalities like "the government should be allowed to mandate a feature" leads to silly arguments like "government can't mandate airbags." We should be having the discussion about what the goal is, what the mandate would be, and what the side effects could be. Otherwise the conversation is too high level to mean anything.