That is not an opinion. That is a fact. It's not public information, and anyone arguing that is categorically, provably, wrong.
The entire country of Sweden can collectively come together and decide that 1+1=3, and I would give that about as much thought as these semantic games around private and personal data.
1. Everyone(1) shall be entitled to have free access to official documents.
2. Official documents are all(2) documents held and produced by the authorities.
(1)=Everyone includes everyone in the world, you do not have to live in Sweden or be a citizen and you do not have to identify yourself.
(2)=Some restrictions apply (natsec, medical, etc).
In short, most government databases are databases of "official documents", including the citizenship registry maintained by the tax authorities.
Downside: All the mundane information about you is public property; address, birthdate, tax records, school grades, drivers license, passport photograph, martial status, court cases and pretty much everything else you can't think of.
Upside: Applies to all politicians as well.
What is and isn't personal data is subjective, regardless what "truth" you believe you're sitting on. I won't claim you're right/wrong as there is no such concept for subjective things, I suggest if you want to understand instead of wave your hands around or whatever you're doing, you'd try to see things from another's perspective and forgo dogmas.
Ontological games are just that - games. Personal and public data is not an opinion, and it's not subjective.
I legitimately think that it's harder to have a coherent definition of a chair than to define personally-identifying vs anonymous data, and pretending otherwise is stupid.