Interesting stuff, Andrew, but not entirely accurate (sorta like "based on a true story."  Anyways...)

Don't know if "marketing driven" would apply (boy, they sure make money), but some of the most successful Hollywood producers make terrific movies that are...well, sorta like independent films, too.  Some examples: The Theory of Everything (Tim Bevan,Eric Fellner; Working Title Films--bittersweet ending, as I recall...), Whiplash--happy ending? Too exhausted to enjoy it! (Jason Blum, responsible for the fright ``franchise`` Insidious). Fifty Shades of Grey. I can hear the retching, but wait! This producer was responsible, with partner Kevin Spacey, for House of Cards! (Dana Brunetti, Trigger Street Productions.) The Heat.  Heard of it?  2013 low(er) budget woman-cop movie, Starring Sandra Bullock.  Sounds pretty indie, right? Except that it made 5 times its cost and was produced by Peter Chernin, responsible for (yikes!) Dawn of the Planet of the Apes...

Ya just never know any more.