In business, in sports, in life, it takes experience to learn needed essential information and skill and then practice these skills. Life teaches us all wisdom in time.
A community organizer is essentially a agitator. Not a desirable skill. MO
Here is the point about Barack Obama, thank you for asking. It is not about his inexperience. It is about what has been and is aggressively experiencing (excercising):
http://www.freerepublic.com/focus/f-bloggers/2501679/posts