Apple's A, S, T, and W processors represent a significant competitive advantage (performance per watt, energy efficiency) in the mobile space; there'll be chilled water in Hell before Apple cedes that to anybody else, least of all Microsoft.
I mean desktop, not mobile, Windows Mobile is dead. MS is not hardware company, so why not make money on good product? And stick it to both, Quallcomm and Intel, they got bit nasty with their 3G and LTE patents :)
Apple's business isn't selling chips, it's selling devices. If they're putting competitors' software on their chips, what advantage does that offer their own devices? None, aside from the OS, and that's never been Apple's value proposition; rather, it's the integration of hardware and software only possible by doing as much of both as possible, not by licensing.
Therefore, "Agree to disagree" doesn't apply. It simply doesn't follow. Apple isn't a chip vendor; it makes chips as a form of competitive advantage. This isn't a matter of opinion.