Huh?  Who is "easily lead"?  Certainly not David nor Michelle, right?  Well, like most things, there are circumstances that allow for that.  For David and Michelle, it's having total buy-in on the vision and the mission.  Commitment ensues and when that is strong, they typically take it to the next level or even take the lead themselves.  Listen to yet another story from Cowgirl Winery in Carmel Valley.  Unlike previous endeavors, this one was an epic crash and burn with David being the butt of the joke.  Would your ego withstand such punishment?