I mean, don’t undervalue your own network without trying. Maybe you haven’t worked with anyone famous, most of us haven’t! But someone you know might be in the right place at the right time and mention you to the right person. Of course it’s imperfect but you have interacted with a lot more people in the past than you are giving yourself credit for. It’s about putting yourself out there and allowing that to happen. No one said to just pray to the network and quit looking though. But people who already know you are a good apple from past experience are the best.