I get what you’re saying, but I’m talking about high energy electromagnetic waves to fully just disable by frying. And by shielding I meant faraday cages and hardening. But generally you make good points.
So I guess the real answer would be waveguide or antenna focused high energy electromagnetic weapons. Which aren’t really compact enough for the battlefield, have complicated energy requirements for front line use, and are more theoretical than practical at the scale needed. Plus then you get into aiming at something that fast.