Having the label embedded in the boot loader meant that the loader did not itself need to contain code to locate and read the label from the disk. However, this system only works when the computer firmware simply loads and executes the boot loader without attempting to determine whether it is valid.
Having the label embedded in the boot loader meant that the loader did not have to include its own code for finding and reading the label from the disk. This system works when the computer firmware simply loads and runs the boot loader without assessing its validity.