> I can guarantee my identity by e.g. scanning my ID card on a system with absolutely no secure boot chain.

Your ID card is on your phone. Go ahead, guarantee you’re not using a duplicate of someone else’s ID card, that no one could duplicate your card, with a mainstream widely available consumer phone.

> I can also guarantee a secure boot chain with my patched bootloader.

Go ahead, show how your grandma automatically guarantees to interested parties that I or whoever else didn’t patch her bootloader to run a backdoored OS, while using a mainstream widely available consumer phone.

> Neither of these things require apps to verify the environment they run in.

Demonstrate a mainstream, widely available consumer phone that does these things without requiring apps to verify the environment they run it.

We can continue this infinitely, but if you keep making sweeping contrarian statements without contributing the proof required then it’s just not worth it.