That's addressed in the film.

> EM pulse weapons

That's not actually a thing.

> lasers

Aside from being impractical, this is bringing a knife to a carpet bombing. The video is about the potential of autonomous drones being used against civilian targets. Unless you put all civilians in bunkers guarded with lazors, they are irrelevant (plus of course you still have created a nightmare scenario where humans need to live in bunkers to avoid random electronic micro-terrorists).