Why do everyone care about privacy so much?

Let's take Google, for example. Google tracks where you physically are - why are some people so much against it? It doesn't hurt me, google just uses it to serve me personalized ads. Why are people so concerned about it?

Google even tracks, which websites do I visit - again, why should I care? When I want to browse anonymously, I use VPN. If I wanted to do something illegal, I guess I won't use google at all and install tor? I'm not sure what should I do in that case, but I'm sure, there are ways to get away from google's sight when people need to.

I don't understand, why some people fight for internet privacy so much. Could someone help me to understand it? What's your opinion on privacy and internet tracking?