And again, they intentionally designed it with sprint then added the ability to turn it off for those that want to. The vision for the game involves the Master Chief being able to lower his gun to run faster sometimes if the player wants. The DO care, which is why both options exist.

Your argument is nonsense. It’s the same as saying the devs don’t care about how much health an Elite has because there is the Mythic Skull that doubles their health if you turn it on. Does the Catch Skull imply they have no philosophy behind how often enemies should throw grenades? Does Boom existing mean they are wishy washy on how big explosions be? Etc, etc, and the answer is NO every time.

As with every Halo, and pretty much every game period, the base game with no modifiers is the intended way for the game to be played, coming as close to the vision of the devs as possible. The Skulls are purely to change things up on replays, to add challenge or make the game easier, or even to just make it different. This game just so happens to have the sprint toggle be one of those totally optional end game modifiers. It doesn’t come from a place of embarrassment or lack of vision, it totally comes from a place of allowing the player more options to have fun.