Hot take incoming.

It’s because using Windows is traumatizing. Windows users are traumatized, and people who decide to become power users are doubly traumatized. The power users share their first trauma with all Windows users, so they have empathetic identification with them. The power users share their second, chosen, trauma with each other, and therefore see eachother as an in-group community.

The very existence of Linux suggests that not only was the first trauma unnecessary, indicating a cruel world, but also that the second trauma was unnecessary, meaning that they caused their own suffering for no meaningful purpose.

Therefore they must resist Linux at all costs in order to maintain their world view that they suffered justly and valiantly, that their friends and family suffer necessarily, and that their in-group is special.

It’s a form of Stockholm Syndrome.