Why? Not everyone is on LinkedIn or has an updated profile.
Some of the best candidates I've hired were people who were in other states who were planning to move, but waiting for the right job opportunity to come up.
We also used recruiters.
Why does it make people so angry that we posted job listings for real jobs that we were really hiring for?
If only we had listened to HN comments and given up instead
I recommend the article "Up or Out: Solving the IT Turnover Crisis" [0] which gives a reasonable argument for doing exactly that.
Notes:
0 - https://thedailywtf.com/articles/up-or-out-solving-the-it-tu...