Why does iTunesConnect ask for export compliance for every iOS app submission?
Each submission could end up live on the store and each change could have export implications.

You could not update things if it's a hassle to do the paperwork, but I don't see any chance that this will be relaxed due to the severity of the penalties Apple would face if they didn't ask and a developer did add content that needed to be classified according to U.S. Law.