For the same reason I can’t use manual base running. Want to screw up an exciting game? Just watch me easily put 2 runners standing on 3rd base. Want to screw up an exciting game? Just watch me throw to the cutoff man when the new cpu aggressive base running decides to head into second. This is not about what you are capable of doing as a “gamer”, but what a ton of us aren’t.
It makes it unplayable.