— Richard Stallman, 1986 (http://www.gnu.org/gnu/byte-interview)
If I were still a teen or even a low-income college student, I'd still be exploiting all the things to get content for free.
Privacy goes beyond me being concerned that google knows my viewing habits... I don't care much about that. I care a lot about being pigeonholed into a certain type of viewer based on what I've viewed before. I don't want to be in an echo chamber, and I don't want google's view of "relevance" to surround me with only the types of videos I've watched in the past. It eventually becomes like breathing your own exhaust fumes.
Google could do better at this, but they seem to be misguided in thinking that people want this. The only solution right now is to not log in with an account, but even then they try and use cookies to get a fix on your viewing habits. It's really kind of sad that they don't see that this turns a lot of people away.
I think you hugely overestimate how measurable this concern is.