It is not true that you don’t gain money passively by doing knowledge work. Some knowledge work is very involved yes, like a hybrid between physical and mental

It is not true that you don’t gain money passively by doing knowledge work. Some knowledge work is very involved yes, like a hybrid between physical and mental labor. But there is some knowledge work where you are simply being paid in case people need you a small % of the time, and most of the time you’re not doing much or very trivial tasks. Like a consultant.