You are aware.. that spending the top dollar on the iPad Pro gets you premium hardware and that results to a better performing OS.If they're going to market and sell currently five different iPads (iPad, iPad mini, iPad Air, iPad Pro 11 and 12.9) at the very least allow those who spend top dollar on an iPad Pro, the same price if not more than a MacBook Pro, the ability to run a more complex OS should they choose. Those who want a simply, touch only interface, there's the iPad, iPad mini, and iPad Air.
It’s like you mentioning… well, there’s the MacBook Air and if I’m spending top dollar on a MacBook Pro I should get a more complex OS.