Yes, that is exactly what I am claiming to be a myth. That unique price point is not a result of appraising the worth of that unique labor. Anyone involved from interviewing to making the hiring offer so don’t give a crap about finding your unique value, let alone your expected value, nor they have the means necessarily. Which means price points are mainly a result of negotiation power of the each party, which is severely handicapped for the candidates, because they don’t know the offers made to others in comparable experience and education. So they don’t know the best counter offer they could make and still get hired. That unexploited margin goes to the employer which has tons of data on past rejections and acceptances so that they can better minimize the offer they make.
In some labor markets, the non-negotiable salary is advertised with the job ads. Not claiming that is an infallible solution, but it makes for a drastically different labor market.
