Very true. It started as me disagreeing and then I noticed similarities between what me and @caid were saying. Just different angles as you sayI don't want to put words in @caid's mouth here, but personally I think you and (s)he are talking about the same thing, just from different angles. That dude/dudette is definitely going to agree with you that they aren't "made simply for the joy of cinema." Scorsese really has a leg to stand on here. They'll once in a while use certain cinematic idioms to present information or emotion, but very sparsely. I'd love for a serious film-scholar to technically break down how many different techniques they use on average, for example.
Also, that hypertext theory thing with Disney/Marvel's serialized (read, comic book episodic) approach is master's thesis material, IMO (depending on how much one can flesh it out).
Somebody else can have the master's thesis though as I need to go to sleep.