I always chuckle when I hear that baseball has a high failure rate - the old "the best only get hits 30% of the time". Well most golf shots do not go in the hole, on a great day maybe 25% will. How many times does a hockey player have to hit the puck before it goes in the net?
I think level of difficulty of any sport depends on the competition. Any sport is "easy" if you are playing someone or a team that isn't very good. Likewise, most anything is extremely difficult if you play against competition that is as good or better than you.