Because, many of us, including myself, feel that the LED's that feature better color rendition is a tremendous advantage over the cooler, flat, dull, colorless LED's that are flooding the market right now. Being able to distinguish your surroundings as quickly as possible as well as see colors in their more natural state is an advantage to virtually everyone, soldiers, policemen, firemen, emt's, and the average Joe taking his dog for a walk.
Surefire's goal is to make the most effective illuminations tools possible for the task to be completed, and many of us feel that the high CRI LED's can accomplish this with greater effectiveness than the cool white LED's surefire is using. Color rendition and depth perception is more important than sheer output, but the way these High CRI LED's are improving, we are getting to the place where we can have both.
It seems there is a common misconception that Surefire only designs and caters to the military and government users, this is simply not the case. Although they are the great bulk of Surefire's sales etc, we civilians also play a large role in Surefire's product line, development and sales. Surefire is smart enough to know how many of us civilians are actually using their products, and different lines that they produce, like the outdoorsman series and saint headlamps, are proof of this.
If I was in combat or patrolling the streets in my squad car, and my life depended on identifying my target as quickly as possible, I would take a high CRI LED any day over a cool white LED that offers slightly more efficiency with 50 more meaningless lumens.