The point isn’t to never fail in public. It’s to keep your failures cheap enough to survive.

Trying to avoid all visible failure means never doing anything where failure is possible, which rules out most things worth attempting. The workable approach is to keep attempts small enough that a bad outcome is survivable: a modest amount of money, a short commitment, a version you can walk away from. Then you can afford to be wrong repeatedly. Cheap failures are how people learn quickly.

Before your next attempt, ask what it costs you if it goes badly. If the answer is too much, shrink it until it is affordable rather than abandoning it altogether.