You have slivers of a second to process the delivery...see the rotation...judge the speed...make a decision..AND THAT IS ALL BEFORE YOU EVEN STARTED TO SWING.
The swing...thousands of moving parts in your body and your head...so hard to have a consistent swing. You need hundreds or thousands of swings a week...using video...on the tee...in the cage. All that time you put in just for a chance to feel IT. Have you ever described that feeling to someone that doesn't play ball? That feeling when you put a good swing on the ball and OMG you barrel that thing up and time it perfectly and you have no idea what happened.
At that point the ball can't fight you because the whip of your bat and the sheer power from your legs and hips just crushed that ball's will to be anywhere near you and that stick that just crushed it.
And it goes...hard...and far. When you are right on it it's an almost magical feeling that doesn't match the physical feeling of a hit.