I find your position so bizarre. It isn’t about privacy at all. You just object to Google’s business model. You are fine sharing your information with a company that charges you to use products but not one that provides free products supported by advertising. You’re going to see ads all over the web. How is seeing relevant, targeted ads such a bad thing? I can’t stand seeing useless irrelevant ads. I’d much rather see ones that speak to my interests. Sorry, I completely don’t understand your objection. You’ve ascribed some nefarious intentions to Google because they don’t charge you to use their products while you’re happy to toss all of your “privacy” related concerns out the window for a company that sells you something. I don’t get it.
It is not just the ads. It is the principle. We have with Google and Facebook two companies collecting huge amounts of personal, often intimate data. For the moment the available computations power is not sufficient to sift through all this data, but the time will come when it will be possible to draw extensive conclusions about your personal life from it. And then imagine those data in the hand of health insurance companies that are looking for reasons to not accept you, or in the hand of HR of companies deciding if to fire you or not, or in the hand of officials from whose goodwill you might depend in sensitive matters. The list of possible misuse is endless when you start thinking of it. The only way to prevent that, is to give those data hogs as little data as possible. Because when something is technically feasible, it will happen eventually, that much is clear.