There are situations where we need to make mistakes, from which we learn. For these situations someone invented shop grade plywood and minimum price lumber.
This is also why it is so important to take refresher classes. Pilots with thousands of hours experience, who almost always are themselves certified flight instructors, still make use of receiving duel instruction to ensure they have not fallen into bad flying habits. The Auto Club offers safe driving courses for seniors. Heh, in June I turn 80. Trust me, I do not want to be a driver who mistakes the accelerator for the brake causing damage.
I believe in Festool End User Classes. Since they became available not so long ago I have spent the time away from my shop and the travel/hotel costs to receive refresher coaching from Steve Bace, Brian "The Sedge" Sedgeley and my fellow participants.
There is an old saying in education, "Teach so ye can be taught." In aviation the saying is "You learn more watching from the ground as your first student solos than you did in all your flying leading to that point."
I can take credit for some useful and profitable ideas, and I have adopted and adapted many, many outstanding concepts. Sure, not every notion pans out. Experience comes from figuring out way a notion failed. Was it a bad idea? Or was it a good idea badly realized?