I'm a business person and would never think to ask a technical cofounder to join my business for 10% equity unless I had cash to pay them a salary, or some mass

I'm a business person and would never think to ask a technical cofounder to join my business for 10% equity unless I had cash to pay them a salary, or some massive intellectual property advantage, or some other advantage that will make success extremely likely at a major ending valuation. (The third thing I cannot even imagine how it would work)