If you don't think this is the case, you're confused. For a long time I thought Google was just a company totally devoid of focus, what with the way they branch in every direction possible. Cars, contact lenses, cellphones, computers, backup management, glasses, email, social networking, translation, web browsing, word processing, video distribution
the list goes on and on.
Then I realized what their focus is:
Ads, and information to power those ads. They would like to know every detail about every person in the world so that they can maximize clicks on their ads. They lack any morale in their means to collect the information on you - they'll exploit bugs in your browser, outright lie to you when they tell you that information collection is optional, and track your every motion, no matter how small, in the physical world as well as the digital one.
That by itself is quite creepy, but it's not (by itself) the part that has lead me to distancing myself from them. What lead me to that was when I took a computer security class which involved labs hacking into (fake) servers and extracting data from them. These servers were set up with more security than most servers have, and breaking into them and stealing everything was trivial. We also had labs where we attempted to protect our own servers from each other. Nobody ever was able to block every attack (and remain online.) Consider the fact that similar competitions exist at BlackHat, where entire teams of security researchers try to defend themselves from each other, and that nobody ever walks away unhacked. It's not possible to make an unhackable system. Everything will be hacked sooner or later, and everything Google has will be stolen. The worst thing Google will do with your data is serve up ads, but for a criminal wiling to break into Google's servers
they could do anything they want with your data.
Thus I've almost completely removed myself from Google. I'm using DuckDuckGo instead of Google Search (it actually strikes me as a better search engine - that's just a happy coincidence), I have my own server/domain set up for email (and I'm planning on moving my website to it in a few months when I have more time).