This what I would be screaming if I tried to swing as hard as Mr Glover. First, I would try... which would probably lead to me dropping a testicle on the grass. And then, in between screams, I would be requesting a 911 call.
I agree in what you are saying that golf shoes definitely help. It probably would knock a shot or two off the score. But for my skill level, comfort is paramount; I need to feel comfortable in my shoes.