Agreed. On top of that Netflix is by far the best platform for Marvel superheroes. Daredevil, Jessica Jones and now Luke Cage are quality shows that would not work as well on TV and IMO have been far more enjoyable than most Marvel movies. The extra 10 hours for these tv series afford writers an opportunity to build better villains, examine more themes and more surprises.
"10 bucks a month for the knowledge that I can watch whatever movie I feel like right now" is a completely different value proposition from "10 bucks a month for access to new, well-made TV series, of which I might find 1 or 2 interesting at a time". Some people want the one, others prefer the other.