If every episode is the same, why do you need to watch more than one episode?
They're not the same. Their
structure is the same, like crossword puzzles or limericks. The
content within that structure is different each time. Mysteries are challenges to the mind, and each challenge is new even if it's the same kind of challenge. Why do people play more than one game of Tetris, or solve a Rubik's Cube more than once, or buy more than one jigsaw puzzle? It's the same kind of challenge, but each time is different.
I haven’t seen the shows you mention, but I wouldn’t call every Columbo episode identical. You can have a formula and still have every application of it be it’s own unique thing.
Yes, that is exactly my point -- that formulaic shows are not automatically bad, that there can be excellent work done within the formula. So now you're completely contradicting your earlier, quite false generalization that
every formulaic show is automatically bad. If you know that's not the case, why did you say it in the first place?
There were times when
Murder, She Wrote was actually a very good example of a formulaic mystery show, especially when J. Michael Straczynski was its showrunner, although there were other times when it wasn't so great.
Elementary was a very good formulaic procedural.
The Rockford Files was a very good formulaic private-eye show.
Perry Mason was generally a very good formulaic courtroom drama. And so on. Doing the same thing over and over does not preclude doing it well.