So, I'm going to chip in with a different perspective from that of some other commentators on here. The overwhelming majority of computers in the entire world, used by our entire species, have windows as their OS.

While I applaud the use of alternatives to windows and it's apps, universities teach it because it is what their graduates will use in the real world. Governments use it because while it has it's flaws, it mostly works and is a universal standard. It's the toyota of operating systems. The parts and manpower to repair it and use it are available everywhere, and it's cheap and reliable.