Setting up a system that invades privacy to catch crimes is bad because once you have that system, all you need is for your government to criminalize good things to reach a dystopia.
In order to avoid that, you'd have to actually run that dystopia, but dramatically and at a small scale.
A great example could be a US state where abortion is illegal and gives actual jail time (I think that's a thing, not sure). You have one of those states put into law that online services must scan for the word "abort" then actually find and put women that had illegal abortions to jail over this.
If you did that, you might get the congress to make digital privacy a protected right at the national level.
Setting up a system that invades privacy to catch crimes is bad because once you have that system, all you need is for your government to criminalize good things to reach a dystopia.
In order to avoid that, you'd have to actually run that dystopia, but dramatically and at a small scale.
A great example could be a US state where abortion is illegal and gives actual jail time (I think that's a thing, not sure). You have one of those states put into law that online services must scan for the word "abort" then actually find and put women that had illegal abortions to jail over this.
If you did that, you might get the congress to make digital privacy a protected right at the national level.