I mean, I understand the skepticism. I get the concerns and complaints you're having.
Personally, for me, I've done the research on how TPM chips work, and the encryption behind it, and generally find it to be very, very secure, and I'm perfectly comfortable using the technology. As far as needing it for graphene, I mean, yeah. If it's used for security hardening, then yeah, they're going to need it. Graphene developers are even highly critical of Debian security practices, and Linux security practices, and standard hardening. They're like the experts at this. I'm going to very heavily trust what they have to say. I mean, they're so overly critical. I mean, it's actually kind of a point of contention in the open source community with how aggressive and obtuse the graphene developers can be over perceived security flaws.
Graphene phones typically don't "phone" home either. All that code was ripped out. Apps can still though.
Even if you get in trouble of legally, I still like that feature of graphene. Also, the little trouble you get for wiping your phone will probably be worth depending on what your activities are Considering this administration is giving people 30 years for doing things like moving magazines.
Didn't know TPM was for DRM originally. Tech was a little before my time and had already rebranded.