Isn’t it enough to just enter your password once to login, then receive a warning whenever you’re about to do something potentially dangerous?
If it’s such a big security risk, how come the most popular and widely used operating systems in the world and their users seem to be unaffected by it?
I guarantee, most new users coming to Linux from Windows/macOS are going to laugh and look at you funny if you try to justify entering your password again and again and again.
NT (and therefore all Windows versions today) always had multi-user security. It’s essentially a ported version of DEC Alpha.
On install, the first user is admin, just like the first Linux account is root, or else you wouldn’t be able configure the machine.
Windows architecture built on DOS (3.x, 95,etc) lacked any such security, and was developed as a single-user OS (goes back to DOS86).