There are cultural implications. For the same reason that thermonuclear warheads are stockpiled but not used these days, they avoid using lazguns because you simultaneously blow up more than you would need and turn everyone against you. There are laws in the empire that prevent a military power from intentionally triggering one of these reactions for obvious reasons.
Sounds like a drone dropping an energy weapon on a shield users head would do the trick then.
There are cultural implications. For the same reason that thermonuclear warheads are stockpiled but not used these days, they avoid using lazguns because you simultaneously blow up more than you would need and turn everyone against you. There are laws in the empire that prevent a military power from intentionally triggering one of these reactions for obvious reasons.
Anyone who does that is getting immediately dog piled by the rest of the houses.