The key part of this that is also opinion, is the “why privacy should be important for everyone”.
That will be answered by the democratic process, not any single person’s judgement. Privacy does not have any inherent importance from god or nature, we give it importance. We decide.
That clarification aside, I do agree with you. I also believe in privacy on principle. However, my belief is my opinion. What is fact is that it saves lives in more dangerous regions. This is more important than any opinion I could possibly have, regardless of how strongly I feel. My opinion on the importance of privacy is mainly based on my concerns for the future, which I cannot be certain of, not the facts of the present day, which I can be certain of.