Clearly you don't know the main use of a sidearm. In real life and in Destiny. You're not meant to run around trying to kill enemies with just the sidearm. You use your Primary initially, but if the enemy gets in close, you switch to your sidearm to finish him/her off. This is why I look for sidearms with quickdraw, for that quick weapon swap. Coupled with a Primary that has single point sling, and you have an awesome weapon combo. This is also where the exotic perk of the Trespasser comes into play. If you kill the first enemy and reload, then realize you've got another one in close range, that longer burst shot helps you get the edge.