Haha, I asked and received. Good work, your arguments are very compelling, but you seem quite dismissive of personal opinion; majority shows that people prefer Robinson.
Be that for any reason: conservatism, personal preference, or ease of use in and of itself (which I know you have proven can likewise be applied to Winkel-Tripel); let us not forget that it comes down to the people.
I know it's customary to have a universal standard for earth maps, but of course, let anybody use whichever maps they choose in their NESes.
For all intents and purposes, however, there is no reason not to switch to Winkel-Tripel other than those of personal preference.