I’m not completely trashing it, but you’re just taking leaps in your own mind. Who says someone knowing they were going to be throwing 140 pitches thought they shouldn’t give 100% effort, when they knew nothing of 100 pitches you get pulled. That’s a later evolution of the game. Your assumption they would approach the game different bc of your knowledge of the game today is faulty.
As for “babying pitchers”, it’s really just semantics between that and teams wanting to protect their $150m investment. I don’t think anyone believes teams do it solely to pamper a pitcher. However, the argument would be they’re overly cautious in their approach and doctors are known for being overly cautious