The tyranny of the majority. Doxing "me" should of course be illegal but for certain groups of "others", it's just fine.
Zuck sure likes vacuuming up and aggregating everybody else's information but gets cranky when someone starts doing the same to him.
What did you think it was? Anything else would typically be illegal illegal.
Pretty much anyone's (in the US at least) information is relatively public. This includes addresses, phone numbers, real estate transactions, criminal records, and far more. Most things people think of as private simply are not.
Hence why doxxing is against ToS for most platforms.
Don't like it? Don't own a house or car.