[Bluestarlizzard]

Which is not to say skip practicing for traditional accuracy.

Physical habits become natural. The more natural the position becomes and the position of your firearm, the more likely you will adopt it in times of stress.

All shooting disiplines benifit you're overall ability.
Should the poop hit the fan and I'm not the one armed, I'd hope whoever I am next to is a bullseye shooter who practices with his CCW for SD sometimes, rather them the guy who does nothing but shoot for "combat accurcy".