Why would an analyst at the NSA be looking at your communications data?
It's a bit like the police getting a search warrant to look around your home. If there's no legitimate reason to do it, like having reasonable suspicion of a crime that requires investigation, then they're not going to.
This is just a rewording of the "nothing to hide" argument.
And your edit seems to ignore that the analysts are humans. Police get caught abusing their access to data resources for personal gain frequently, why are NSA analysts different?
(Not even touching on the fact that mistakes happen, leaks happen, breaches happen, laws change, political winds change direction)
> It's a bit like the police getting a search warrant to look around your home. If there's no legitimate reason to do it, like having reasonable suspicion of a crime that requires investigation, then they're not going to.
Yes, it is a bit like this. Except in this case the police don't need a warrant, they can enter your home for any reason at their discretion. You're putting a lot of trust in a bunch of people you've (I'm assuming) never met working for an agency that has demonstrated a complete lack of regard for the constitution. Either that or you're a really terrible glowie: "How do you do, fellow tech enthusiasts??"
Setting aside the legality/morality/whatever of the data collection itself, you seem to place a lot of faith in the NSA’s ability to keep that data private.
Maybe they want to look at the naked pics being sent between you and your sexual partners, as has happened many times. Maybe they want to spy on their own sexual partners or prospective partners, which has also happened many times. Maybe they want to blackmail people for their own gain, which has, once again, happened many times. There are innumerable reasons with plenty of precedent for each and every one.