Agree, but not sure what that has to do with execution. More passion? More expertise? You think that's why 4sq won?
Nearly every startup ends up with a list a mile long of potential features, ideas, refinements, communities, partners and revenue sources. Being able to pick out the right few to work on (and what to say no to) is maybe the most important skill a startup CEO can have.
A founder who has been around the same space for a long time can use past experience and intuition where a newly-minted CEO knows very little and is actually best off when they recognize that.