One blob of red in the wrong place and the audience isn't looking at the hero, they're looking at a patch of curtain (or something similar) and your whole effect is lost.
If you need to take a step back from day-to-day operations and plot out the long-term direction of your user experience strategy, consultants can give you a perspective you can't get on your own.
The body is sort of a pain. It has to go to the bathroom. It has to be comfortable. But the spirit is indestructible. It can move at the speed of light.