The bigger market in this instance is "mobile devices," of which iOS accounts for nearly 60% of users in the US.

It's not nearly as aggressive of a split as MS/everyone else, but being the larger side of a duopoly a lot of vendors don't really have the choice to just ignore them, and meanwhile their users are subjected to this.

The comparison also starts looking a lot closer when you consider the way it impacts web development as a profession that the same ~60% can't choose a browser other than Safari in any sense that has practical meaning.