[Suicide Junkie]

So your actually less vulnerable with the bigger mounts. It is like adding armor to your weapons.

More hitpoints mean they are more likely to be hit and thus die first.

However, if the enemy delivers a few thousand damage to drain your shields and armor, a few extra hitpoints on a gun is nothing. Besides, your crew won't have any time to think about the ramifications of losing the guns before they are reduced to their component atoms by the rest of the volley...