That's what the Lost creators claimed though, and we all know how that went.
Mrs. Davis from Lost creator Damon Lindelhof was a great recent example of that lesson having been learned.
(Shame about Westworld though)
Oh man, don't remind me.
There was a surge in viewership as they tried to tie up the story prompting the renewal of the show. But way too late. That they were able to pull off season 5 with the scraps and missing major cast members is kind of impressive. Perhaps indicative of what it would have been like had it been produced piecemeal
So much so that Star Trek had to pivot TNG and DS9 from problem of the week formulaic writing to something similar.