You take any big brand and study who follows the founder, Every successful successor is either someone that closely shadowed and worked alongside with the founder, or they were long time veterans of the firm which means they can continue to grow the firm in right direction. Some examples below.
Steve Jobs -> Tim Cook
Warren Buffet -> Greg Abel
Bill Gates -> Steve Ballmer -> Nadella
Page/Brin -> Eric Schmidt -> Sundar
Bezos -> Andy Jassy
Instead, if you take a garden variety hourly consulting MBA like JD, who has no fu--ing clue or muscle to grow a behemoth of firm organically and all he can think of from his poverty mindset is to cutting corners every step along the way (all the while filling his pocket), then that firm is destined for doom.