There's a big difference between war and spying. Accurate intelligence can actually prevent wars as it keeps governments honest about their movements and actions. It can also limit the damage of aggressive actions as it allows us to help target only the actual enemies rather than the enemies plus everyone in the entire village (obviously not 100% accurate).

Your claim that having the tools to spy on people is inherently unethical, but I don't buy that. The ability to hack a TV is nowhere near the ability to destroy a city with a WMD. It's not even on the same slope.