“It’s a good idea to keep enough control so that investors can’t fire you (there are a lot of different ways to do this), but beyond that, it’s important to bring in other people and trust them to help you build the company.”
In a non-profit structure, your options are much more limited. There are no shares, no shareholders, no IPOs, no investors, no valuations that you can appeal to as an indicator of your performance. Conflicts within the board often boil down to a battle of reputation and influence, ego and resentment.
It's easy to get the share structure you want if you're the founder of a typical C Corp.
He was the initial board members. Not founders.