Why do you need to "make them afraid"? Why is your feelings toward privacy the only correct one?
Owning a keyboard is potentially "giving everything you type to a company". Connecting to the internet at all is possibly giving the whole world access to your machine. Using ANY service is giving them information about you that could be used against you.
Why are those tradeoffs okay, but giving a company access to your email not (access, which is already given to Google as the one actually running the email service)?
Nobody is saying they want it to be a free-for-all where anyone that gets access to your information can use it any way they want with no security or tools in place to manage it. But I feel I should be allowed to decide who I'm able to give my information to, especially when I get something in return. And I want there to be controls in place to prevent abuse, I want to be able to revoke that access at any time, and I want the legal system to be on my side if things go wrong, but I don't want someone condescendingly trying to make me "afraid" of a conscientious decision I made that is making my life better and all parties involved are happy with.
Just like how you shouldn't be lambasted for using a keyboard which could possibly contain a keylogger embedded in the device, I shouldn't be insulted for wanting to use tools and services on my information that benefit me.