Unfortunately, Apple is not one to revisit their previous decisions very often. With the move to Apple Silicon, the capabilities of the bootloader were locked in (chain-of-trust, ability to load other OS and keep chain-of-trust on macOS) and that was it. Apple is telling you what they support; there's never any damning secret with them. You want to run Linux? Run it in a VM on macOS. That's what marketing has been saying since day one of the M1.

Them's the breaks.

I don't mind using Apple's native Hypervisor framework, it's better then QEMU (speed/overhead), but Apple has no support to passthrough USB ports. https://github.com/utmapp/UTM/issues/3778