Advertisers and stores now try to track things whatever people betray an interest in, even if they don't buy or say they like those things.

However, it is false to say that "we" are subject to this. Maybe you allow it to be done to you. I don't allow it to be done to me. I don't connect to those web sites; the nonfree Javascript code used to track what people pay attention to will be blocked in my browser by LibreJS.