Because of a "dominant market position". Nobody says "can't appear" or says anything about a literal monopoly or literally not exist (or whether butterflies are made out of butter); that is just short hand and how language works. The point is that any alternative, ethical or not, is much too easily stifled in the current environment. Allowing competition to actually happen would be better.
Because the whole history of Microsoft is based on the EEE paradigm. And now because of inertia it's almost[0] impossible to move away from it for any org that has been using their products for years.
[0] "Almost", because I know some large orgs that finally managed to break away, but it wasn't easy at all.
