You shouldn't. Google is selling your info and your data every second of every day. That's not to say you shouldn't use their services. You just shouldn't trust your personal or private data to them.
This is why i never understood the willingness of people to shove all their data into the cloud, nor will i ever condone the use of or use the "cloud". Stop being lazy. Own your data.
The difference is that I get a choice with Google. The government, not really.
And I do to for now, but the problem is that we don't know who will be running the company 5 or 10 years from now. Or how their privacy standards or security standards may change if the markets change and put pressure on revenues. Or if they just get greedier.