I wouldn’t even expect them to understand basic marketing themselves: there’s a lot more to it than many assume. I would hope they could understand the value of someone that does. There’s this kind of “well if I don’t understand it then it’s probably not worth understanding” cockiness in software that I was definitely guilty of in my twenties at the very least. Someone thinking they can dismiss expert knowledge or even entire fields out-of-hand based on a few a priori thought experiments says a lot more about that person than the fields they denigrate.