There's also the fact that Google only started challenging the FISA court post-Snowden. To my knowledge, they're not even challenging the unconstitutional spying, just the gag order preventing Google from telling you how frequently Google turns over your data to the feds.
This isn't just some theoretical, might be spying on "those people" sort of thing either. If you're reading this website, you probably are/have been a target:
https://firstlook.org/theintercept/document/2014/03/20/hunt-...
Since Google openly acknowledges that Google never really deletes anything from gmail and other services (disk is cheap), they're providing information about you that even you have long forgotten.
And finally, if you say "I have nothing to hide, I have nothing to fear" then you have completely missed the point of how this stuff works. Remember they target you, everyone who contacts you, and everyone who contacts that extended group.
With that information, they find out who you love, and which ones of those people have pressure points. "Viraptor, it has come to our attention that your father is evading taxes. You wouldn't want anything bad to happen to your father, would you? We would like you to do some work for us in your role as sysadmin. Then we can forget about that incident..."