I think it's a responsible attitude, but perhaps for reasons you're overlooking.
Communication is important in general, but vital in a start-up situation. If you're of a technical mindset and have a partner who is business minded, you two may have a significant communication barrier.
Any healthy partnership has enough overlap in terms of expertise that the ability of one partner to communicate to another using a language they understand.
Sometimes this takes a third partner who's somewhere in the middle and can intermediate and provide a more objective opinion when the other parties take opposing sides.
That being said, I'm sure there are start-ups where the founders do not have a lot of overlap, but I doubt they will succeed if they do not make the effort to find or create some common ground to have informed discussions on.
If you don't understand "business types", then perhaps it is responsible to not go into business with them. The "poor attitude part" may mean that you're not willing to make an effort to learn more about business, though.
