There are work around’s to this yes. But work around’s are simply ways to achieve the outcome you actually want, when there is no actual direct way to achieve the effect. Yes you could do those things, but having the predator able to trigger the alarm itself provides so many more tactical options in my opinion as opposed to running around saying “I am here!” in hopes the AI are smart enough to say holy crap throw the switch.
The goal of the switch is to provide the predators with more tactical approaches to situations vs. the current meta of directly engage and smash their face as soon as possible. I want feel like a hunter, not a battle diving Achilles from Troy.