Not to tempt fate here, but this is why eFuses were adopted at the SOC-level.
You can’t encrypt everything in a way where I can’t hack my devices. Sure difficulty and risk will increase once you start hacking in the hardware, but it’s the hardware itself that will be the final vector. This was just the destination we were always headed toward anyways.
We can't rely on hardware staying hackable. We couldn't ever since "secure boot" became a thing.