I would say Amazon has plenty of problems, but also plenty more incentive to behave and try to be careful with the data.
This is legal for the FBI. An illegal wiretap is not.
I guess you could say my threat model is not “the United States is my adversary”, and more that I appreciate some checks and balances being present on ‘local yokel’ police departments which are empirically not always doing the right thing (especially where oversight is low).