That's common in the history of science and enginering. First, someone got something to happen more or less by accident, although sometimes the accident happened because they tried a lot of possible things. Then there were attempts to improve on the new thing. Eventually, detailed theoretical understanding of the new thing was achieved, and it got much better. From pottery to semiconductors, that's been the path of progress.

We're now at the point where, by fumbling around, people have developed a sort of brain-like thing that they don't fully understand. That's just the starting point. Now it needs theory.