Because Microsoft is the subject of this thread. We could pick on other corporation, MS isn't the only one, but whataboutism isn't an argument.

And MS practices are not standard business, they certainly understand the rules well, but have have been making illegal moves, it is a fallacy to word it as if illegal moves were part of the capitalism game: Monopolies are to be prevented, that's why anti trust laws were put in place, which MS was already caught breakig.