These are NPCs from two factions with superior technology and decades... no, centuries of military tradition. They are struggling amidst a brutal and bloody civil war... yes, I believe Gallic bombers with SNAC are warranted. (Not to mention that fact that Gallic NPC patrols often include capital ships... suddenly having SNAC on NPC bombers makes sense, eh?)
In singleplayer I flew around Gallia doing missions with many bombers a while ago... I didn't even realise they had SNACs or were bombers for a long time because they never managed to hit me. I suppose it would be worse if you were flying a large ship, I was flying a bomber.
I guess the moral of the story is... don't fly cap ships in Gallia x3