Inaccuracy is a sin. Remember - there will always be more enemies to be purged than there will be ammunition available.

"You know, they shouldn't have set their phasers to 'miss'.
— Mystery Science Theater 3000, Space Mutiny

Give him a gun, and the safest place to be was between him and the enemy.
— We Few, describing Erkum Pol

I could aim - but with this thing, I don't have to.
— Thor Pilot, Starcraft II

Even with their military training and access to a seemingly unending supply of ammunition, The A-Team never successfully shot anyone during their career as mercenaries.

— Cracked, 6 Supposed Action Heroes You Could Probably Take In A Fight