Or is "publicly available" used here to include data breaches and data sold by gray area data brokers? If this is your point then what would qualify as private information ? If this isn't your point
It's like saying that someone publishing your bank account balance or nude photos is fine, because someone once stole that data and released it on the internet.
If some random person didn't like you they couldn't just casually (in 5 minutes) dredge up every controversial thing you ever said of that conviction from 15 years ago.
A lot of this new technology powers abuse on a scale that just wasn't possible before. Things like doxxing/revenge porn were very real threats with life changing consequences but in many cases the worst of it would pass and any memory of it would remain long buried on some faraway corner of the internet no one would likely see again.
A real human would have to sit down and spend hours and hours trying to track down dirt that may not even exist, it represented a huge investment in every target. Now someone can just take a picture of your face from just about any angle and dredge up anything they want at a touch of a button.
Google her stage name. Her legal name appears instantly from Instagram and Facebook. Not very hard.