There are a lot of unexpected side effects lurking in those sort of decisions. For example Apple developed Pages, Numbers and Keynote because nobody else was able to compete against Microsoft. It's hard to see the computing environment would be better off without those products.

You can argue that someone else would fill that gap but they didn't really seem to be doing that before Apple stepped in. In fact I would guess that Apple would have preferred not to have developed them, it's not as if they generate any direct revenue.