This is interesting, and I think worth trying. However,

    The process is iterative:

    Vibe code users <--> Vibe code software

    Step by step, you get closer to truly understanding your users

Nothing beats feedback from humans, and there's no way around the painstaking effort of customer development to understand how to satisfy their needs using software.

I agree. I do like the general idea as an exploration.

Perhaps the idea is to use an LLM to emulate users such that some user-based problems can be detected early.

It is very frustrating to ship a product and have a product show stopper right out of the gate that was missed by everyone on the team. It is also sometimes difficult to get accurate feedback from an early user group.