Basically, the only use of business guy is because of necessary evil BS that one needs to wade through in order to deal with paper work. The same use for a lawyer. It's not actually part of the product.
Necessary evil.
Necessary evil.
It's a really odd term though. A lot of non-tech founders aren't necessarily business guys (MBA's). They may have a lot of knowledge in a space, eye for design (Jobs), ability to lead a team and build a product & biz that grows.