It's a capitalistic market. When everyone does X you have to figure out what Y is which will differentiate yourself. When everyone uses linkedin to target then you have to find other channels.

Everyone should read Traction by Garbriel Weinberg. It's for startup marketing but job searching is basically marketing yourself in a world that has one dominant channel (recruiters). The efficacy of different channels is time varying as they get saturated- You have to find the one that works for you at any given time