Stare upon the FRBTheory wiki in delight then, here are ~50 different theories describing the same thing: https://frbtheorycat.org/index.php/Main_Page

As a generous guess at most 40 of these models are wrong, since they all describe basically the same few events with vastly different mechanisms. I guess that majority of interesting but wrong models is what you are after?

The space of incorrect-but-reasonable models is infinitely larger than the space of correct models. The way to distinguish between the two is experiment. Experiment is therefore the much more important side of the balance.