I never posited that, and of course we should not throw away our liberties. I just happen to think that defending your liberties requires a healthy dose of realism about how the police and judicial system
actually work. As difficult as that may be to accept, that also requires some level of trust in those institutions and in what the leaders of those institutions say.
When police or FBI say that current laws and processes are insufficient to deal with a changed environment and they need help, I've seen that the left tends to demonize them, question their motivations (like of course cops want to set up a surveillance state), and then give a hand-wavy argument that 'well, getting a warrant worked in the past, so it must work fine today'. Basically accusing cops of lying about having problems, or lying about needing new tools and processes.
That doesn't seem very fair, and it's certainly not a way to have a constructive discussion. I mean, these two statements are basically the same:
1. You can't any trust climate scientists, because of course all they want is to scare you into giving them more funding and power
2. You can't any trust cops and the intelligence services, because of course all they want is to scare you into giving them more funding and power
IMHO both these statements are false. Even though they're imperfect, our cops and intelligence agencies by and large try to do right, and it'd be better to understand challenges from their perspective and come up with innovative, privacy-protecting ideas that work, rather than to blindly accuse them of malice when they suggest something that we disagree with.
If you think people are doing things wrong, first try help them do right.