"A technical marketer will say, "I tested 100 variations and these 3 performed the best. Let's try and optimize them even more." I disagree with the idea that

"A technical marketer will say, "I tested 100 variations and these 3 performed the best. Let's try and optimize them even more." I disagree with the idea that "your VP of marketing should be an engineer". An engineer may be able to test before or after the fact but a real marketer already has a framework to start from that gets you on the dartboard. All things equal sure it would be nice to have a marketing person who is creative but also an engineer. But the world is not perfect. And the best brain surgeon is rarely also going to specialize in performing heart operations. I think you are also discounting what I will call "get a law degree" effect. Sometimes the training than one has (or how your brain thinks that even allows you to pursue some profession) is contraindicated in another profession. With a lawyer this would be the tendency once trained like a lawyer to always think of problems as a lawyer would (and not be able to take appropriate chances that a non lawyer might). Engineers can be creative of course and they could be marketers. But as a generality I don't think the benefits of thinking everything has to be tested and optimized is so clear cut.