It's a common use-case for x86 machines that implement UEFI. Taking the iPhone and iPad into account, it is a nonexistent use-case for mobile ARM chipset owners.
I know you may have a particular axe to grind here, but Android devices are not a whole lot more likely to let you boot a vanilla linux distro. Apart from a handful of explicitly linux-compatible smartphones, the boot loaders tend to be pretty locked down, and the drivers all propietrary too
