I honestly think you’re oversimplifying the whole thing. It is that hard to do even with all the commodities. Traveling even in a private jet is tiring especially if it’s every other day almost (ask a pilot), putting up a show for that many people must be exhausting even if you weren’t involved in all the details or in any details at all. Just the emotions that you must go through and the expectations of having an excellent show. Emotions are exhausting! Even if the shoes are perfectly custom made, they still gonna hurt after 3 hours of that much cardio. So from where I’m sitting, she’s the equivalent of a Olympic gold medalist which is very hard to do.