3d printing is a great analog because there are so many critical considerations that are often missed or can't be accounted for in the prototype, but, it's alright because it's a prototype. The strain testing, durability, manufacturing at scale; none of that is properly addressed. Those might involved some serious, expensive challenges, too. But it's alright because you've got something in your hand that informs you whether or not those challenges are worth contending with. I really love this about LLMs and 3d printing.