Libertarianism is a great idea as long as every actor is altruistic and interested in the welfare of the society above themselves.
Exactly. Everyone Libertarian I've ever encountered is exactly the opposite.
It is well established (through most of history) that direct contacts and personal networks are the most likely way to get jobs.
And what is one to do if there is no available GOBN to troll for a job? In my last search, pestering everyone I know about job openings got me nowhere. What did get me hired was applying for a position via a company's online job site. A well-designed LinkedIn profile is also valuable, though it does result in being spammed by offers for worthless contract jobs.
This means that while it is still important to apply through the web because they pull many workers through there, it is far more effective to get an employee referral.
And whose butt are those employee referrals supposed to be pulled from? I did once get a job this way, in 1989, though that was a bit of an anomaly. It's a different world now and a different market.