So you accept Cricketers require to be technically more sound of adjusting to heights, swings, spins that ball comes with. Actually because Cricketers are highly trained to make contact with the bat, with not so much training they would also perform well with a baseball bat. I've seen others and done myself training with the round wicket (that you see placed behind batsman) when I was at academy.

So because batters in baseball are never trained to hit a ball that comes off the deck, they won't perform well in Cricket without much training.