Earlier quoted context omitted.
You can't do that because someone (probably not you) will then unlock the phone and [insert something evil here - perhaps involving the radio]
The radio firmware is something that is at another level. Even if you end up unlocking the bootloader, that doesn't give you access to the radio firmware, that is proprietary and needs to be signed, and cannot be modified. It's basically seen by the OS as a modem to which they talk trough AT commands (yes, they are still in use), the same thing that you would obtain by plugging in an USB modem to a normal PC. For Wi-…
Who's to say this? What if i'm Apple and my ''partner'' radio chip manufacturer (cough qualcomm cough) doesn't give me access to changing the bootloader? Why wouldn't 'forced unlocked bootloader' also apply to Apple-owned devices?