I'm not a writer for any of the shows, so I don't know for sure, but if I had to guess, I would say it could potentially come from trying to stretch the story out so it fits the preset number of episode.
I don't get it. J. Michael Straczynski and Joss Whedon were able to stretch out one major story arc within a 22-episode season with the likes of "BABYLON 5" and "BUFFY THE VAMPIRE SLAYER". Yet, the Marvel Netfilx writers are barely able to stretch out one story arc within 10 to 13 episodes? Writing for television has really declined over the years.