Great question — answering as the UphillTech team:
Because Netflix is better suited for the type of show that Daredevil, Jessica Jones, Luke Cage, and Iron fist want to be. More adult than would fly on broadcast channels like ABC, and not suited for Disney's branded channels (cartoon and teen programming). And Netflix offered substantial benefits that the traditional broadcast model did not Straight from the horses mouth : Produced by Marvel Television in association with ABC Television Studios , this groundbreaking deal is Marvel’s most ambitious foray yet into live-action TV storytelling. "This deal is unparalleled in its scope and size, and reinforces our commitment to deliver Marvel's brand, content and characters across all platforms...
Full answer by cde: https://movies.stackexchange.com/a/53263 (CC BY-SA 3.0).
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