Assuming the founder knows the problem non tech people have, which in practice doesn't happen except in very very very rare cases.

It's an "if you have to ask..." situation. The people who understand the problem likely come from the business world they're trying to sell to and their question would be more specific, or they wouldn't need to ask in the first place.

Any b2b solution you need to demonstrate to a user for them to understand it is going to be very tough and expensive to sell.

If a user is not actively looking for your solution because they don't know they have a problem, you're going to have to educate them which is quite expensive and not quite the right fit for a solo founder.