That workflow is because it teaches you why booting works. And when you truly understand the first 512 bytes of your disk, no boot failure can surprise you.
: BOOTICE includes a built-in editor for Boot Configuration Data (BCD) files, allowing you to manually specify or find active OS BCD files to alter boot behavior without searching for hidden system files. bootice manual better
The MBR tells the computer how to start booting from the disk. That workflow is because it teaches you why booting works