[nradov]

The AMA no longer supports that position. They have been lobbying Congress to fund more residency slots for several years.

https://savegme.org/

And the AMA isn't the only organization representing physicians. Many of them aren't even members. It's not like a union or something.

Even today there is no legal quota limit on residencies. There's only a cap on slots funded by the federal government through Medicaid. Other organizations are free to fund as many slots as they want. If you have the means you could go to your local non-profit teaching hospital and donate money to expand their program.