Not being able to come up with an idea seems to be contradictory to the prior observation that founders needed to be 'endlessly resourceful'?
Recognizing pain points and opportunities seem a vital entrepreneurial skill to me, but then again there's no harm in applying the scientific process to verify assumptions.
"Endlessly resourceful" is a broad statement. Groups that are resourceful enough to take an idea/problem (self-sufficient idea or given too them) and expound upon it, is no different than creating a start up, to fill a void or disrupt an industry.
Recognizing pain points and opportunities seem a vital entrepreneurial skill to me, but then again there's no harm in applying the scientific process to verify assumptions.