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

Do not fool yourself. This is not "truly" "understanding" your "users". This is a model which may be very useful, but should not be mistaken for your users themselves.

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.