As always it depends on a lot of things, but anyone with a background marketing should be pretty versed in product-market fit. It is a fundamental concept to marketing in the same way double-entry bookkeeping is fundamental to accounting... I'm sure there are a bunch of people calling themselves marketers who are really just sales drones, but there are also a lot of developers who are just spaghetti coders and accountants who are really just glorified filers and data entry specialists.