Also shooting along a trench is a bad defensive measure. It is inherently dangerous as the only direction of fire can be absolutely parallel to the trench itself. Even the slightest angular deviation from 0 degrees will result in the blast being directed at a trench wall. This makes at least as little sense as the cross guard on Kylo’s saber.
I think fandom grasps hard for things to explain why they disliked something they disliked. Star Wars is every bit as logically flawed as the PT. But we like Star Wars because it connect on some level whether that be emotionally or some other way. It is not beloved because it is logically consistent.
Fans use logic gaps to discuss why they didn’t like something because their minds go into debate mode.