Which is why if you're job searching you should spend a decent chunk of your time making connections. Go to meetups, work on open source, volunteer, join a hackathon if such a thing still exists near you as well as "job board" job searching.

I read the evergreen "What Color is Your Parachute" when I was 18 or so (before the web), and it profoundly affected my take on job search (and sales). It gets updated pretty regularly though the original author has passed not that long ago.