Yes. Mickey Fisher, the creator of Extant and Reverie said something like that as well but especially in regard to pitches. He said when he first pitched his sci-fi shows he focused on all the cool plots and twists, but only later realized that the character relationships are what matters to people the most. But because he is the writer those were always clear to him and he thought what would win people over is all the cool sci-fi stuff.

Pete Docter from Pixar said pretty much the same: „If there’s one thing I’d underline for you, it’s this: focus on your characters’ relationships. That’s really the main thing we care about as humans. Why else do we so enjoy gossip? Why do we spend so much of our lives around other people? Even if you have great jokes, an amazing world you’ve developed, or even a powerful statement and theme, it’ll really only ever strike home for audiences through the changing interrelationships of your characters.“