The person you were quoting literally had the word "complete" in there. I find your response odd.
A pitcher is one of 9 (10 if you count the DH) players. A goalie is one of 6.
Obviously, they are more important than the average non-pitcher/goalie, but the great majority of the game is decided by their teammates.
A pitcher is especially important, while pitching they have something like 30-40% impact on the game (I read a Sabremetric article on it a ways back, but can't recall the numbers exactly). However they typically pitch only ~2/3rds of the game.
A goalie probably has 20-25% control, I'd guess. More than 1/6th for certain - but definitely under 25%.
Also, the reason the huge majority of greatest players ever have been skaters is because the variance from one goalie to another is not as big as between skaters. The gap between best goalie and 15th best goalie is little compared to the huge gulf between best skater and 75th best skater.
I know I'm kind of rambling here, so sorry for that

I just find these discussions of importance of players interesting.