Sounds like a drone dropping an energy weapon on a shield users head would do the trick then.
iirc computing is pretty gimped in Dune as well because of previous issues with AI, humanity limited development on that front and focused on developing human capabilities instead, which is where spice came into play…it like super charged your cognition in order to navigating ships through space or something like that. Someone familiar with books please correct that I’m sure it’s not perfect.
That’s why they have “Mentats”.
Also, the book was written in the 1960’s. At the time, you still communicated with a computer using a teletype because nobody had thought to put words on a screen yet. You can also see this in the original Star Trek - they never show a screen with text on it.
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.