I know multiple people who have gotten death threats because of technical comments they made online, or just for having the temerity to exist as a member of a minority group. Not the vague "I'm going to kill you" kind, the "here's a picture of your front door on Google Street View, and an unsolicited pizza, I could SWAT you at any arbitrary 3am, have fun being afraid" type.
This is by definition not whataboutism. Whataboutism is when you distract from a thing with unrelated things (e.g. "but there are more important bad things going on in the world than this!"). It is not whataboutism to bring up legitimate related counterarguments for a policy.
The public, i.e. the people on this planet, have a right to know who is claiming to own which part of the grass and soil that we all share.
This is a really complicated and broad topic that I cant take the time to type out here. I do not stand on the side of "I have nothing to hide." I fully understand the risks of that position. People must keep some secrets to protect themselves from society. Especially as everything devolves into increasingly strict "purity" tests.
With that said, I don't think the right to obfuscate real estate transactions is the same as spicy personal beliefs/private conversations/etc. IMO there is nothing more public than real estate. I do not consider real estate transactions as protected speech nor one that can be legally hidden. We live in this world together.