This is an exaggeration at best. For the vast majority of employees there is a lead time to begin employment at most places. Typically this will be a minimum of one month (interviews + decision + org readiness to onboard).
By the way, it applies equally to founders as you describe (anecdotally I've seen a number of founders get regular jobs while they wound down a business).
"Left with nothing" except social connections and, exactly like the employees they had to fire when the business failed, a need to generate income from another source.
Founder lionization is absurd.