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The problem is in validating the prototype. Whether the users are consumers or enterprises or internal stakeholders, they aren’t going to try 10 different prototypes. They will try one or two.

Most business software isn’t complicated to implement (i.e. it doesn’t require multiple prototypes to determine which technical approach is best). Usually for most apps you approximately know the technical implementation. What requires taste, experience, or whatever you want to call it, is the user experience and if your software actually solves a real problem. You can’t really just churn on prototypes to solve that. You will lose the patience of your user base.