None of the roles listed in the edit can be done well, or at all, by people who don't have even a basic grasp of the industry they're working in.
Re: Ask HN: I am studying economics and want to work in Tech. How?
#21It might beg the question, but if the OP has a stated lack of interest in the subject matter that makes "tech" companies tick - I'd suggest reevaluating the motivation.