Good point. By this logic, evolution is more about creating the best architecture, which I think is also a good analogy. But I also think that a lot of the brain's "weights" are pretty much set before any experience (maybe less so in humans, but several animals are born pretty much ready, even ones with complex brains, like whales), the genome information is, in a sense, very compressed, so even if isn't setting individual weights, it does determine the weights somehow, I think.
Does anyone know if anyone has investigated these questions more seriously elsewhere?