It's because the driving wheel jerk from the front wheels being forced to turn will break your thumbs and/or other fingers. You instinctively take your hands o

It's because the driving wheel jerk from the front wheels being forced to turn will break your thumbs and/or other fingers. You instinctively take your hands off the wheel if you have raced karts enough to get into a crash where you hurt your thumbs, that or you've trained to do it. I even do it on racing sims some times, completely out of instinct.