Grew up with a dirtbike. Love sliding and jumping and berms and stutter bumps. Unlike cars, trees don't move, even if they do hurt when you clip one! I'd do things in the dirt I would NEVER do on the street. But it's getting harder and harder to find good places to ride dirt bikes. Sure wish there were good places to ride nearby.
Anybody who really wants to improve their emergency maneuvers for street riding ought to go out for a couple of hours on a dirt bike. Learning to work a bike while standing on the pegs and to handle a bike when nothing is touching the ground are very useful skills to have.