Inconvenience of using non-Apple products is part of Apple's design philosophy. They have no interest in interoperability beyond what came accidentally when they used BSD/NEXTStep tech to replace OS 9.
Trivially so, since you said “no interest.” If they had none at all, why would they go so far as to actively support non-Apple services?
Relatedly, their aggressive support of the Web as a platform is by definition interoperable. Their best-in-class mobile browser (or nearly — source: PPK/Quirksmode) can almost be considered a universal interoperability module.
