If you ever observe from the distance anyone with even a little success, you will notice the amount of 'yes' people that surround them. It is as if such people get a little boost of esteem by being recognized by the individual concerned. Lottery winners, presidents and pop stars have hordes of people following them around. Such people are often idealized and guarded by these leeches.
I am reminded of the band Metallica. In the film documentary 'Some Kind of Monster,' everyone is bumming and blowing how great the new album sounds until the drummer's dad turns up. He is pretty critical about what he hears and speaks his mind. His son Lars takes this the right way. He laughs and recognizes what is going on. He sees the value in his father's friendship.
Likewise, during the band's induction into the Rock N Roll Hall of Fame, Lars thanks the people who have never been frightened to say 'no'. These people are vital to Metallica's success and help them move forward critically.
So often successful people do not have these kind of no-friends and so lose their way.