Painstaking experimental ascertainment of protein structure doesn't really tell anyone "why" it ended up that way either, but it's still been worth doing and advances science a great deal.
Right. The challenging thing about protein folding is that we've been able to probe protein folding in numerous ways but none of them actually give a direct picture of what the process of folding looks like. That is, the specific physical configuration trajectories/envelope followed by an ensemble of folding proteins.