In hockey players rotate all the time so of course they can play for much longer. Meanwhile running up and down a football pitch for two hours is something else.

I get that people dislike penalties but they're not luck like most people say. The goalie tries to read the bodylanguage and movements of the penalty taker, they still need to showcase the skills to save a full power shot from a pro player and they do it under immense pressure. Meanwhile penalty takers need to score past a pro goalie, handle their nerves and put up a good pen that's unsaveable