Is this one of those "if you're not doing anything wrong you have nothing to worry about" arguments? If I'm (we're) not that "important", why do they need the d

Is this one of those "if you're not doing anything wrong you have nothing to worry about" arguments? If I'm (we're) not that "important", why do they need the data in the first place? In order to determine if I'm (we're) "important" enough, instead of having some sort of evidence/proof to begin with like the constitution spells out. It's the biggest fishing expedition in the world, and can also be used in the future based on past data. They have no business looking at my data unless they have a legit reason to, as in I've done something and they have enough evidence to take before a judge and get a warrant. Due Process. Not the other way around.