I mean... isn't that kinda like saying: "we need to learn how to cure cancer, and not just improve chemotherapy"?

"Curing cancer" is A LOT more complicated than "chemotherapy," and it gets more complicated the further you look onto it.

Yes. We DO need to learn how to mend nerves. We're working that. But who knows when we'll even be close? Here is a potential patch that can help people NOW.
We're advancing both. One is just gonna take a lot longer to get the results we want.