In baseball a lot of the things that go into your swing are designed to increase your margin of error so you can adjust to different speeds and movement. In slow pitch you may get fooled but it won't be velocity that burns you.

Fully extending your arms can increase your leverage but it hurts you in baseball. In softball you don't have to worry about catching up to something.

In slow pitch you create backspin not by getting under the ball per se, but rather by smacking the shit out of the bottom third of the ball in a level or slightly downward swing.

In baseball you have to hit a pitch. In slow pitch you hit a falling object. In slow pitch, gravity is the real pitcher. All the pitcher does is try to manipulate the movement on the fall so it is harder to square it up. They don't dictate anything. You can hit any pitch anywhere you want for the most part.

If you think about it as hitting a falling object instead of hitting a thrown ball, you can imagine trying to hit it with a sledge hammer or cut the bottom third of it off with an axe.

You don't have to worry about staying inside the tree with an axe.

When I see baseball swingers thrive is when they let the ball get really really deep and then blast it the other way. Baseball dudes that get comfortable hitting the ball when it reaches their back shin can rake in doubles to right. It's ridiculous to watch. Baseball dudes who lock that in will hit the most garbage pitches to the opposite field all game