Is that true though? When Apple made tracking opt-in, pretty much everyone refused. I think that's a clear indicator that the overwhelming majority do want privacy, and if they're actually given a choice, most will probably take it.
The issue about not understanding the cost is real, but that's not unprecedented. There was a time when most people didn't understand the cost of cigarettes and tobacco, but that problem was solved through government intervention.
Edit: to clarify, I said the tracking is “opt-in”, but it’s not a default. iOS explicitly asks you to choose between tracking or no tracking. It does not assume any default.