On the other hand, an ace starter will face 1,000 batters in the course of a season.
And an everyday position player will only make 650 Plate Appearances.
And more physical effort is required to throw, say, 110 pitches than to play nine innings in the field at any position -- save catcher.
But that everyday position player also plays defense. And will probably play the whole game. Pitchers used to be able to play the whole game, odd that in this time when every sport is seeing players getting bigger, stronger, faster and performing more pitchers have diminishing expectations.