as difficult as plugging in a flash drive

That’s a gross over-simplification

They have to

1. Download the windows ISO
   • How do you find the original ISO and not a cracked one?
2. Get instructions to modify the ISO
   • Hope you get the right set of instructions from a genuine website
3. Download Rufus and install
4. Make backup of their data
   • Hope you disabled Bitlocker also
5. Reboot and press the F? key to change boot order (F? varies from system to system)
   • How do you even find the right key for this?
6. Follow the installation process

One of the reasons Linux is not widespread is because following these “simple” instructions is too much for an average user. So I doubt a Windows user will be bothered to modify their OS. I have installed different variants of Linux 100s of time and even I need to check online if their are any hidden gotchas.

but if you install it right

Basically eliminates the vast majority of people who don’t have the technical knowledge to deal with Rufus