It's not simple math, because you're ignoring my point - that you don't actually know how often the tools are used in ways you find morally correct, because those don't get publicized.

I'm not saying I have a clue what the answer is - I'm certainly very skeptical of invasive technologies. But I think pretending there's no upside to them is wrong. Like most technologies there are pros and cons. Probably the system in most Western democracies works relatively well - there are adverserial members of the system trying to prove and/or refute the idea that the tool use is necessary, a judge has to sign off, there are checks and balances (including free press) on abuse, etc.