Legit question. ChatGPT isn't super helpful here since it agrees with everything when I'm really looking for someone to say why this isn't really feasible in the real world.
The way privilege escalation works on Windows is that pretty much everything gets launched with a standard user access token by default, and processes can request an admin access token in a few ways, UAC being the main one. When a process is supplied that token, that process is elevated.
It is more akin to 'sudo' rather than 'su', which makes sense because its progenitor is 'runas' from Windows 2000.