I think most people would perfectly be able to do this, they just don't care. So why force privacy on them if they don't care about privacy? Even with this warning message I guess that 99% of the users will just click it away without reading it.
Not having the technical expertise does not mean not caring about privacy. A lot of technical people make that mistake. The users click it away without reading it because they don't understand it.
Hence, people might feel that a level of privacy should be provided by law, not by optional technical doodads.
You think most people understand the concept of cookies in the browser and how to change the settings for them?
Maybe people don't care about privacy as an abstract concept, I think people do care about possible outcomes - say my partner borrows my machine and starts seeing ads for the surprise holiday I was planning.
