This seems to be the classic efficiency vs effectiveness. Would you rather go as fast as possible (maybe in the wrong direction), or take the time to make sure your on the right path.

If you have stake in multiple companies I can understand why you would advice go for speed, as chances are big at least some will go in the right direction. And they may be ahead of more deliberately planned startups.

But as a founder with a limited amount of tries I'm not sure what I'd do....