Now now, I'm sure there are coders who have those areas of expertise as well!
Seriously, coders are not the only valid cofounders for this kind of company, but they're the only necessary ones.
For example, I don't see a lot of coders begging for "a guy with the vision" who can provide them with a "can't-miss idea" they can put "sweat equity" into. It's always the other way around.