See, I live in Pakistan, where we have mandatory ID cards that are required for anything, and the data of which has been leaked, and where you literally don't have a right to privacy, or any other rights, for that matter.
So I have no delusion that I have any privacy whatsoever from the government, and frankly I damn care because, after all, it's not like I've done or said anything wrong, I self-censor myself quite strictly.
What I fear are mistakes in data collection.
Sometime ago, I went to get a copy of my "family tree" (a legal document) upon the passing of my late father, and discovered that by mistake some other people's data had been linked to the same family tree as ours (some typo in the family tree ID field, the rest of the data was clearly distinct).
Imagine the consequence had I not asked them to correct this, from inheritance issues, to being picked up by the secret police because some "supposed" family member had done something and they check the database, discover I am "linked" and question me about my none-existent sibling.
The fact that I have nothing to hide would be little solace as the police perform rubber-hose decryption on me.
Worse yet, with the data breaches, my (outdated) data being in the darknet means loan sharks using it can come harass me for any debts my supposed relative took.
There are so many reasons why data security/privacy matters, none of which have to do with hiding anything.
I still fear any new additions or deletions in the database since then, but I can't keep going to the HQ and asking to verify my data every day.