Is Failure the Best Teacher?

I watched STAR WARS: The Last Jedi recently,  and in that movie, one of the characters essentially says that failure is the best teacher. I don't know whether or not I agree with that. I know that there are some things that we could only learn through an earthly experience, and that an earthly experience always involves failure (except in Jesus' case), but I don't think that God would set up a system in which experiencing failure is the best way to learn.

Then again, why not? If we're going to fail anyway, we might as well get some good out of it. Every failure is an opportunity to learn from our mistakes. If God knew that we would make so many mistakes, and if He has the power to influence this sort of thing, then He might have ensured that each mistake we would make could also serve as a learning experience, thus making failure one of the best teachers, if not THE best teacher.

But I still don't think God wants us to fail. I'm sure that He would strongly rather that we successfully resist temptation and not have to suffer any moral failures at all. Naturally, we would still have physical and mortal failings from which we could learn, but I think that God would rather that we learn moral lessons the easy way rather than the hard way.

However, if we're already learning lessons the hard way, maybe God would soften the blow by making it easier to learn from our mistakes. Yes, it would be better to learn moral lessons before we fail our moral tests, and God would, theoretically, make the right way to learn also the best, but it's those who are struggling with a concept who need the most help in learning it.

It might be true that failure is the best teacher, or it might not be true. But whether failure is the "best" teacher or not, we can still learn from it, and we all make mistakes frequently enough that there's a lot we can learn from them. So, when we make mistakes and experience failure, we should try to learn something from that failure, especially if we can learn not to make those kinds of mistakes. But this doesn't mean that we should go out, trying to make mistakes that we can learn from, not by a long shop. Failure may or may not be the best teacher, but deliberately making mistakes in order to learn from them definitely isn't the best way too learn.