Originally Posted by JerryM
...I cannot imagine a CHL holder having to shoot at 25 yards.
It's not necessarily a question of someone having to shoot at 25 yards in a self defense situation. It's that practice at longer distances is very helpful for developing and maintaining fundamental marksmanship skills, and those skills are useful for defensive gun uses.
That said, it is desirable to be able to practice more self defense specific skills such as presenting from a holster, shooting quickly and accurately, shooting while moving, etc. But it's difficult to find places where those skills can be practiced. Classes and some competition, like IDPA, can be helpful in that regard.