> Why not? Why can't faster typing help us understand the problem faster?

I think we can, in some cases.

For instance, I prototyped a feature recently and tested an integration it enabled. It took me a few hours. There's no way I would have tried this, let alone succeeded, without opencode. Because I was testing functionality, I didn't care about other aspects: performance, maintainability, simplicity.

I was able to write a better description of the problem and assure the person working on it that the integration would work. This was valuable.

I immediately threw away that prototype code, though. See above aspects I just didn't need to think about.