The protection from snooping government for law abiders isn't for humdrum people like you. It's for people working to make the world better who come under fire through no illegal activity of their own.
Did you know the FBI put MLK under surveillance at the orders of Bobby Kennedy (then-Attorney General)? They didn't find evidence of crimes, so they threatened to publicize his extramarital affair if he didn't give up his civil rights work.
It's about preventing unchecked government power over those who aren't criminals who are working against the status quo.
OF COURSE you don't care if the NSA reads your email. You don't change anything, and subsequently don't matter.
We as a society care if the NSA reads the private emails of the next important up-and-coming political party leader who will break us out of the corporate-owned two-party system. THAT'S the person we're trying to protect, not boring uninspired people who "have nothing to hide".