I was fortunate that I was able to quit my job work on my business.
I think there are two ways to go about it.
1. get VC funding early on and pay yourself a salary.
2. bootstrap for cashflow from day one, start with something small.
I have always believed difficulty is inherent to the problem. Regardless of whether that solver is a machine or a living organism.
Maybe I am tainted in the same way since I studied complexity theory.
I have always held the opinion that the so-called LUI is a fad.
We humans are terrible at communicating, we want crutches / guard rails to help us getting the message through.
That is to say I do agree with the author to an large extent.