Does anyone actually use secure boot in the intended way? As in: adding a key to the register and then booting a binary with that key. I'd guess everyone simpl

Does anyone actually use secure boot in the intended way? As in: adding a key to the register and then booting a binary with that key. I'd guess everyone simply disables secure boot and installs their system. Then, what is the point of secure boot? I'm pretty ignorant about this stuff, but secure boot makes no sense to me.