He's right. Movies (hell, any art) being reduced to "content" is bad. As these big conglomerates ran by folks who don't give a jot about the art they produce have more and more say this problem will just escalate. Sure, art v. commerce has always been an issue, but at least in the past the jerks at the top probably had some interest in movies instead of, say, the head of a phone or internet company that finds they now own a film studio via a merger.
Personal recommendations and curating from experts is just the best because you end up seeing things you never would've on your own. Go outside your comfort zone! Bollywood musicals, silent comedies, East Asian crime films - these might be your favorite things but you'll never know if you never go out and find them!
He's also getting on studios to preserve and make there films available, which is something I can't imagine any movie fan disagreeing with. Availability is a huge thing. I'm fortunate enough to have a public library that always prioritized classics and foreign films. I was introduced to so much this way.
(Serious part over - now somewhat tongue-in-cheek segment)
Also, folks get salty that Marty doesn't like superhero films. I can explain this: you're either born a hero kid or a monster kid. No one likes them both the same. Scorsese, who frequently opines about Honda's Godzilla movies and Hammer Horror films is obviously a born-and-bred monster kid like myself.