I think it's a mistake to equate all "non technical people" as "idea people" which is what I seem to be reading in your post. There are people who are just "idea people" who have no particular skills in terms of technology OR business.

But real "business people* provide a TON of value. Someone who understands marketing, distribution, sales, fundraising and all of those things? Tremendously valuable to startups (at least some classes of startups). Find me somebody who can construct and execute a solid marketing strategy, craft a good "core story", do market research, develop solid positioning, and who understands PR and how to get stories placed, someone with an extensive personal contacts list which includes the kind of customers you're looking for, someone who understands the fundraising process and has connections with investors, someone who can cold call a customer, get a meeting, make a presentation and close a sale.... find me that person and I'll offer them a significant equity stake in my startup, to join up as a non-technical co-founder, even if they've never written a line of code in their life, and have no interest in doing so.