[scorpion032]

A "polymath" is a person whose expertise spans a significant number of different subject areas.

Greeks celebrated such great thinkers. Leonardo da Vinci, Michelangelo, Galileo Galilei, Nicolaus Copernicus, Francis Bacon and Michael Servetus were all amazing polymaths. - They had expertise in Math, Engineering, Philosophy, Art, Finance. (Perhaps not marketing because such a thing didn't exist back then.)

There have been such multi disciplinary experts in the world and I'm sure there continue to be. But they are rare and often found pursuing interest in one of the areas.

If you can understand tech there is no reason you cannot understand sales and vice versa. - In fact being blind to an alternative point of view isn't even a feature of a man of class. And if you can understand it, why can't you think the same way.