One of the most dangerous combinations of founders is the Domain Expert + The Engineering Wiz.

Why?

Because the Domain Expert tends to have a deep understanding of the breadth and depth of the problem and tends to believe it ALL needs to be solved on day one. The Engineering Wiz tends to embrace the complexity and dutifully and diligently build ALL the things.

What do they need to derisk their journey?

A product leader with taste and judgment.

The product leader can push back on requirements, find embarrassingly thin slices to build and ship, and ensure that technology becomes a product before moving into adjacent areas of the domain.