Maybe I'm being naive, but there can be something else that the non-technical founder brings that is equally valuable to the tech stuff: paying customers. If they have actual customers that are ready to pay, then the deal may be worth it even for less than equal share of equity. Another is cash investment (not relationships with investors, real cash of their own that they are willing to invest).

I think most of these non-technical founders just have a fantasy about a product idea and it really is worthless. But if they have a good network of contacts and people ringing their phone for whatever they want you to build then that is some value.

If these idea people are so sure of their ideas, they can finance development using freelancers and they don't need a technical cofounder. If technical cofounder is just doublespeak for programmer willing to work for free + equity, only someone very naive will take it.