If it were any company other than Uber, you would not even have heard about it. Think what one will about Uber (and my thoughts are admittedly not positive), it's not like the gummint has a stellar track record on raiding only guilty parties. IOW, I find this no more unusual than, say, keeping your servers patched.

Maybe Uber's hiding stuff? Yeah, maybe they are. But when the government comes in and grabs all your shit, they get the upper hand while it's all sorted out. Violated the 4th Amendment? Yeah, that's too bad, we're really sorry about that, we promise to unsift what we've already sifted through. It's easier if the stuff is just locked down to begin with, then after the raid we can make sure our warrants are in order, you actually have the right company, and you're just generally allowed to do this, then we can unlock the machines with smiles on our faces.