That’s not true even if they are young, single and childless, have highly general skills, and live in a booming city, and the further you get away from that the less true it becomes. Many people live in an area where there are not that many options unless they want to move or deal with a worse commute, not everyone enjoys interviewing, and even those of us in high demand areas have been feeling some slack - I’ve heard more programmers talking about delays between jobs dragging out than any point since the 2009 bubble collapsed.
Again, my point wasn’t that the power is distributed 100:0 but that it varies a lot and only a small percentage of the workforce enjoys the odds being in their favor.