Earlier quoted context omitted.
You would confuse like 20% of your users to add a feature that < 0.01% want?
There's a micro-industry of journalists who teach users how to express their consent, even if vendors use a dark-pattern privacy UX. If less than 0.01% know to request a non-existent option, more may choose that option once it exists and they have been educated on the benefits. Witness the rise of ad-blocking and past industry attempts like "Do Not Track" and "Do Not Call".
Do Not Call stops annoying phone calls from interrupting you. Again, people demand it, because it makes a real difference in their lives.
Do Not Track, on the other hand, seems to be a total flop. (In FireFox, 8% adoption rate and falling; in other browsers, presumably even worse.) I don't see how you could refer to "the rise of Do Not Track" with a straight face. This is due in large part to the fact that the vast majority of people aren't particularly interested in making the ads they see less relevant and don't really care about whether a website is giving them an anonymous cookie.