Correct me if I am wrong, but is your argument “they aren’t investigating you, they are just collecting all of your call data and other traffic and storing it in case they want to investigate you later”?

I said no such thing. I said they aren't looking into your data just because you called a foreign entity.

They collect it and store it indefinitely, though, which we now know thanks to Edward Snowden.

I think you are moving the goalposts with terms like “looking into”. They are in possession of it and have permanent access to it. For emails and SMS, this involves full content, too.

It even includes US-US communication if the stored communications provider replicates it out of the country, which is so common as to be expected in almost all cases.