Privacy is also about solidarity with those who do have something to hide. We want to create a society with herd immunity for dissidents, free thinkers, and even the less controversial yet somehow still controversial; fetishists, (closet) non-traditional-sexuals, or simply those who engage in behaviour that we have only learned to condone, not yet accept.
Even if you are not any of those, it is our duty to provide a thicket where the free canaries can hide from the harsh environment. When they die, we best pay close attention.
Saying “I don’t care about privacy because I have nothing to hide” is uniquely selfish, on the level of “I don’t care about gay marriage because I’m not gay.”