Variety always breeds more choices, which oftentimes can lead to confusion and mistakes.
But variety also allows more varied shots, which can be applied in more different situations.
Say you're walking into a gunfight at the OK Corral. Most of you bring sixguns single action, and a few lever action rifles of 8 round capacity.
Should you bring your VulcanMiniGun with it's 200 rounds and 40 lbs weight?
Should you bring your F-23 and the attendant servo crew and runway, fuel and weapons systems?
Or should you bring a backup slingshot, a combat knife, and be done with it?
Which would you choose?