Disagree with the premise: Privacy is a right, not a weapon.
I appreciate the passion behind protecting the ability of individuals to have privacy, but it’s not a right, so don’t argue for privacy rights from a faulty premise that it just “is”. Argue why it should BE a protected thing.
This is why the second part of the statement falls short: The taking away of privacy can and will be used as a “weapon” because those with power to do so can indeed take away that thing from you. They can’t take your soul, they can’t take your beliefs, and they can’t take your mind; they can take your freedom, privacy, movement, and even life because those things are not inherent to YOU. They are things protected by law, but evildoers can and do love to take those things from us, which is why we have to fight for them in the first place.