That's fair, but I think the point I was using leading to about staples not fitting in every deck still stands.
We are just going to have to disagree here. My definition of a utility land is a land that land that does something than just tap for a mana. Tons of players run Maze of Ith and classify it a utility land and not a spell. By that same guideline, I also consider Gaea's Cradle and Cabal Coffere more as "rituals" than regular lands, but I acknowledge that this is a personal viewpoint that is only shared by a couple of by card buddies.
I don't see a contradiction here. Players constantly tune their decks to get them to play more the way they want those decks to function... That is by that very definition a player perfecting their list. And the more you tune a list, the easier it becomes for you to define cards that don't fit or don't coincide with what that deck is trying to do. If people weren't trying to perfect lists, you wouldn't have decklist threads where people are actively looking for ideas to make then better.
The reason few decks are perfected, is because either the environment shifts creating new needs for the deck, or new sets come out, making people reevaluate it the deck can be further refined.
Can lists ever get tuned to the point a player stops tuning it... yes, at least until the next set release. To use your point, pros put in so many testing hours for the sole purpose of perfecting their deck, and when a deck becomes optimized to the point that it becomes oppressive, cards get banned.
The think the reason most players haven't found that golden spot for their lists, where they can say "I'm done" with pride and not frustration, is that they dont spend the astronomical amount of time and effort it takes to do so, and move on to the next shiny object instead of working through and solving the existing kinks to get that deck to truly be an extension of themselves. That takes passion. Those are the pet decks players can't put down, and the ones players keep coming back to. Few players have the passion to do the work. Those that do, wind up becoming experts on those decks, and of the few that do, even fewer put in the time to share their work and progress. That's why it's rare.
It was just an example, and an explanation for why I'd do it, nothing more. The fact you're explaining to me that my example of crop rotation use suggests a misunderstanding of what your Pheldagriff deck is trying to do speaks exactly to my previous point about the deck perfection processscavenger grounds). Kor haven? I'd rather have it out already to send the attack elsewhere.
But like I was saying before... you value apples, I value oranges. Neither one is wrong, just different playstyles. Personally, I'd never play Pheldagriff cuz I hate kingmaker style decks, and so does my group. We also don't like playing a super long games, as we have wives and kids, and our free time is precious.
To each their own.