Thats got to be the most retarded ignorant piece of advice I have ever heard. Your leaders primary job is to solve your problems. Once those are solved more will come that need to be solved. If he cant solve those new problems you start looking for someone trustworthy that can solve the new ones.
For example. Leader A gets you to the top of the mountain. Well its ******* freezing at the top of the mountain. Now leader A has to figure out a way to keep people warm. If leader A cant keep people warm then you start looking for someone you trust that can. What you dont do is follow the sad sack of shit thats trying to be the new leader that was holding you back when you were trying to reach the top of the mountain.