I wouldn't automatically discount the value that a restauranteur or real estate developer could bring to office. At least it would bring a bit of diversity of opinion compared to the roomful of lawyers. Though in this case, we're experiencing the opposite problem: people who have absolutely no idea how legislation is done or how the government functions, and who cannot be convinced that they're not experts in every domain they touch.
It would be nice if people came to DC with the intent of listening, discussing, and coming to conclusions together. But the system is adversarial by design, and grows more adversarial with each passing year.