Earlier quoted context omitted.
It's the same fundamental problem, but side-loading isn't the only way to address it. People leaving the platform can apply market pressure on Apple to do the right thing.
It's not a very compelling message though: I'm leaving you Apple, because you censor apps, to another platform that also censors apps! (Granted, in all fairness, the Android Market removes apps as well, but side loading is kind of the eventuality here).
It's not preposterous to say "I'm leaving you because you do too much of something I don't want (pollute, overcharge, play bad hold music, whatever) for someone else that does a little less of that same thing that I don't want (pollute, overcharge, play bad hold music, whatever)"
If the market pressure is strong enough (I don't think it is, this is all hypothetical) then it could be something that Apple and Microsoft and Android and others actively compete on.