Yeah cause they are meant to carpet bomb. That was why they worked for me, that and I liked the design. You have the Resistance's only bombers as old old surplus from the end of the civil war, meant for planetary bombings mostly, and largely converted to mining vessels (which in lore is actually how the Tico sisters learned to fly them), clearly not in good shape and even moreso nothing akin to Y-wings which can maneuver. I loved it, the point was that this is what the Resistance is relying on, they cannot even afford to spare these hunks of junk as they are their only bombers. Yeah they are shit for the job, but they are all they have on them.

It's one of those lines between a stupid idea on a story level, and a stupid thing that on a story level tells us something fundamental. I view it like complaining that the speeders at the end are dumb cause they literally break from Poe's foot pushing down. It is there to show the desperation of the situation.