the steering geometry of a modern bike is not entirely obvious, most configurations are either unstable or unsteerable. Plus a bike is unusable if you don't know how to ride it, so even if you stumbled on a stable steering configuration you might give up on it before you learned to ride it.
When I was a kid I taught my neighbor kid to ride a bike by rolling him down a hill. He crashed eventually into a wall (tangentially, so no great damage to him or to a bike), but he did ride bicycle after that crash course, no problem.
