These founder raise pre product market fit because they can, and often raise too much money. Having too much money when you don’t really have a viable product that people want can easily turn your company into a zombie, where people are just sort of going through the motions because there’s nothing else to do but chug along.
I’ve seen it many times. Some end up eventually finding the market after a few pivots but it’s really not a fun place to be as an employee with little decision making power. And the founders are usually wealthy enough at that point independent of the success of this current company that it isn’t “do or die” for them which creates another layer of zombie-esque behavior.