It's amazing what lengths people go to to justify their convictions and not realize the silliness. You've just described a convoluted setup with many drives and computers on network and claim there is no more work.
That is more work for everybody except if they wanted a) completely encrypted main disk and booting from portable guarded USB, or b) set of computers in school or internet cafe with boot process managed/updated efficiently via network.
This system does provide new special capabilities, but it is not for free. Meanwhile, most users are happy with defaults like 1G partition with bootloader and kernel, which allows easy updates without worrying about having the right USB drive, being in the right port, being mounted in the right path, or losing it.
That is more work for everybody except if they wanted a) completely encrypted main disk and booting from portable guarded USB, or b) set of computers in school or internet cafe with boot process managed/updated efficiently via network.
This system does provide new special capabilities, but it is not for free. Meanwhile, most users are happy with defaults like 1G partition with bootloader and kernel, which allows easy updates without worrying about having the right USB drive, being in the right port, being mounted in the right path, or losing it.