Its actually really rare to make a great movie. It's biggest contributor in outcome is good director and it's team but still sometimes they can produce bad or not so bad movies. In other case I think like %99 of the movies are never get close to be great, it's rare like startups.
Look at Tom Hooper, he had good movies and in the end jumped into lowest possible level.
PJ defined the product that was LOTR against the objectives pursued by studio. Then that same entity got their true wishes with the Hobbit.
It’s not that the Hobbit sucked as much as LOTR was the exception that proved the studio rule.
Also, a thousand geniuses can’t change the trajectory of an idiot boss.
Creators create, studios iterate.
See also: Star Wars, Star Trek
Why don't they focus on this more?