I agree with you up to a point. The problem is that most people asking this question are already developers and what they really need is exposure to the things

I agree with you up to a point. The problem is that most people asking this question are already developers and what they really need is exposure to the things they haven't had to deal with before. Stuff like Marketing, making sales, customer support, staying profitable and general "business sense." A general introduction to small business book is probably enough to cover the basics there.