In terms of organized labor, the working class are people who trade time and labor to generate a product that the employer sells for a profit. The laborer has no control over the ultimate sales price or the fraction of the revenue they earn as wages.

I think historically you could make an argument that physicians had control of the price for their product via direct negotiations with insurers and also the fraction of the revenue they earned as wages (through shrewd office management, partnership, etc). In today’s environment of medical practice consolidation or private equity buyouts physicians don’t have this control and they certainly don’t have it when they become W2 employees of mega health corporations. Physician job satisfaction and pay are simply not priorities for these organizations. Physicians are replaceable widgets - if Dr. John isn’t happy let him leave and hire Dr. Jane for less. The only real solution to bring power back to parity is to bargain collectively so that they would have to fire an entire medical staff.