In so many cases theres lot of examples where the individual behind a videogame fell behind, stagnating or probably move over from the great franchise they do
Like david jaffe with god of war, shinji mikami with resident evil, cliff blezinski with gears of war, hideo kojima with metal gear solid, john carmack with doom etc
Im not saying miyazaki is going to follow the same path ( aka his future game going to be bad) but who knows what happened in the future as theyre just a mortals and we should treating them like gods
What im sayin is if miyazaki went out there will always be other options out there