that argument doesn't relate to this discussion at all, though. you aren't limited to only buying Apple devices in your neighborhood, are you?

There are entire countries where one company has 93%+ marketshare. Yes, maybe people can go to another country where the marketshare is different, but do we all seriously think that the global marketshare not resembling a monopoly definitely means that there's no one market where a monopoly exists?

I imagine trying to effectively use (or market) a competing product in a region with 93%+ marketshare is a painful experience, regardless of whether the global marketshare is more balanced.

Using global marketshare hides details like that. Apple could have 100% of the market in China and India, and Android could have 100% of the marketshare in the rest of the world. This would put, worldwide, Apple at about 35% and Android at about 65%. I would argue there are clearly monopolies in that case, though, even if the worldwide numbers are 65 and 35.