Re: Privacy is mentioned nowhere in the US Constitution.
I'm as much a conservative as you're likely to find, but I'm also an originalist, and you're not being honest in your reasoning.
1) The third amendment is very much, although not exclusively, about privacy. Pre-telephone, quartering is a VERY effective way of keeping an eye on "troublesome" people, and almost everyone involved in drafting and passing the constitution either themselves or their fathers would have qualified as "troublesome" not too much earlier.
2) The "and their papers" of the fourth amendment is, again, very much an issue of privacy. How would the "committees of correspondence" have fared if the government had driven very far against it? Or for that matter, what if a businessman happened to corrupt a government official & seize papers for competitive gain?
3) One of the objections that was raised against the Bill of Rights was that the inclusion of certain rights would result in the disparagement of others. The idea that these recent revolutionaries would have had _any_ truck with the "if you have nothing to hide, there should be no problem" bs that has occasionally been pressed by some faux-law-and-order types is laughable.
Privacy certainly _is_ one of the "unenumerated rights". That what has been done by prior courts at times under the banner of the privacy has been abominable does not affect this fact.