To be fair, I don't think that's always possible when you factor in last-minute or unforeseen production problems like injuries, weather, location rescheduling, problems with the actors or crew, and ridiculous studio mandates. With a big budget movie, that's a reasonable expectation, but TV production is, from all reports, a much crazier and intense experience.
Which isn't to say that big budget superhero movies are exempt from this either, as we saw with Justice League and the nonsense related to Snyder, Whedon and the rushed CGI and reshoots that led to Superman's bizarre upper lip.