I am a big poker fan, and play a lot, and I cansay that it would be mentally impossible for me to win wsop, because of how demanding it is, yes. I can barely keep mentally in play for more than 4, 5 hours in a row once a week. Let alone 12 hours a day for 8 days in a row. But it also doesnt have much more of a sport than that.
But golf has everything, its probably the most demanding sports of all, not physically, but the other aspects cover this, by far. Anyone who has played golf at high level knows what i am talking about. Toughest sport to be good at
Disagree, although it is very difficult, you are standing still on every shot, which I feel lowers the difficulty slightly. A sport like tennis even has the same degree of difficulty as golf on each shot, a similar mental snapshot, but it includes movement.