George Orwell supposedly* wrote that
“Journalism is printing what someone else does not want printed: everything else is public relations.”
A piece is journalism if and only if someone does not want it printed.
Orwell does not want public relations printed (as if it were journalism.)
Orwell is someone.
Printing a piece (as if it were journalism) is printing something.
Someone does not want public relations printed.
∴ Public relations is journalism.
* Actually, it may have been William Randolph Hearst: “News is something somebody doesn’t want printed; all else is advertising.” After all, this is a more useful distinction for a publisher: advertisers are revenue streams, while journalists are expenses.