This is likely my last reply to you. No offense intended!

You, and the guy I replied to prior ... are certainly interesting.
Why waste resources trying to monitor normal people?
9/11.
How do you know who is, or isn't normal? Get ahold of the excellent TV series from years ago, "
The Americans"
https://www.imdb.com/title/tt2149175/
What reason is there to treat everyone like a criminal and monitor everyone's activity?
9/11. I know for a fact I have to say this ... Because I know for a fact you'll make assumptions otherwise.
Simply giving an opinion as to why another is doing something, doesn't necessarily imply agreement.
You will never be able to hear 100% of everyone on the planets conversation anyway when they can simply just meet in person.
Soooo ... don't try to hear whatever you can? Don't shoot for 100%? Don't aim for the moon? Aim for the stars? Don't try to make more money, because you'll never be able to make 100% of the money?
Everyone already knows phones can easily be tapped, and there are multiple ways to have a secret conversation without the use of encrypted messages.
Soooo ... you're saying this, to say what?
We waste too much time and resources going after people who don't even harm anyone else, and to treat everyone like a criminal by infringing on their privacy is not the answer.
Soooo ... how do we know, in advance, who has harmed another? Soooo the police should never investigate, question, obtain phone records, interview friends and family and coworkers, obtain bank records, etc., of a suspect because ... they don't
know,
beforehand, that they harmed someone. (And they never will, without doing the above.)
We should be more worried about someone doing harm to someone else than to be worried about "Oh man! My neighbor is selling cocaine! He must be arrested immediately!"
LOL ... Don't mind me, I'll likely just be
watching this show, going forward.