Because that's the right way to do it (for non-removable discs), and the way that you mention is the wrong way to do it.
* https://jdebp.eu./FGA/efi-boot-process.html
Because that's the right way to do it (for non-removable discs), and the way that you mention is the wrong way to do it.
* https://jdebp.eu./FGA/efi-boot-process.html