I'd say it's all the aspects combined that make hockey players the most skilled/athletic. And yes, skating really is that hard! That's why parents spend thousands of dollars to put their kids in hockey schools from a young age, and seasoned players put themselves through them to improve further! It literally takes years to learn and train your muscles to take powerful strides, stop properly, skate backwards (some pros still can't even do this well), lateral movement, crossovers, ect. And then you have the puck handling and shooting which is just as difficult to get good at, let alone master. Then there's the conditioning... Hockey players have the most rigorous workout routines short of olympic runners. Their physical endurance is greater than those of other athletes from any other major sport.
When you consider that hockey players manage to do all this while wearing 30 lbs of protective equipment and getting run through the boards, fighting off hits and slashes, and going all out without a rest for 2 min, you have the answer to this thread.
When you consider that hockey players manage to do all this while wearing 30 lbs of protective equipment and getting run through the boards, fighting off hits and slashes, and going all out without a rest for 2 min, you have the answer to this thread.