Windows is worse , just latest example: a USB WiFi antenna for the PC, on Linux it just works, on Windows you need either to buy a CD drive to install the drivers - not sure if your grandma can buy a cd drive, install it and install drivers. On Linux it just works.
People like buy a computer and use whatever is on it, they can't manage to install windows, the drivers needed for the hardware, I had to setup emails, or other online accounts for this kind of people so give them a preinstalled Linux and they should manage,.
