Lots of information is public, such as your address. That doesn’t mean somebody explicitly publishing your address for the purpose of harassing you isn’t committing an offence.
Some celebrities can’t fly on passenger planes for their own safety and even that of others or the proper functioning of infrastructure. Can you imagine Taylor Swift trying to fly on a public carrier? She would get mobbed at the very least. At worst she might be putting her health or even her life in danger. Especially now that the MAGA morons are attacking her.
I find Taylor Swift bland as beige, I don’t get the appeal at all, and I think Musk is a rabid twatwaffle. I also don’t believe anyone should really get to be so wealthy. Still, there are good reasons why one might need to travel by private means without their movements being broadcast.