Earlier quoted context omitted.
They’d probably only do it once. It builds character, similar to == in JS or PHP.
Says no one who has ever raised kids.
In my case, I taught them this by laughing at myself when I fall off my bike, so I am modelling the outcome I want--them learning to try things, fail, and laugh--rather than some kind of "do as i say" style of parenting.
But even falling off bikes can have an unacceptable worst case. So we insist on helmets. It is bad parenting to allow undeveloped brains to suffer avoidable and entirely foreseeable concussions when reasonable precautions like proper protective gear exists.
I think that sums up our parenting approach: Model the risk tolerance we want to encourage, including both taking risks and managing the consequences intelligently.
After that, it's up to them.