The optimised process was only for weight and strength, not manufacturing. How would you craft the right one? by 3D printing? Good luck with the required strength, while the human designed one would cost a few dozens bucks here, hand welded. As a mechanical engineer, when you design something, think of the poor guy who will have to make manufacturing plan for it. Yes, maybe one day computer will be able to do both, but the problems still come from human, and human is notoriously known for undefined behaviour.