I don't see it. In my experience with AI/Claude so far, building something with AI then changing direction half way through is a great way to generate garbage structure and garbage code. It takes time to dig yourself out of that hole, possibly more than if you had just slowly built by hand from the beginning all. Maybe I'm holding it wrong.

It might make failure faster, but that doesn't mean it's cheaper.

Users will churn quick if you aren't reliable or useful and a security incident can be company-ending for a startup.