The difference being, being a doctor is (in many parts of the world) both more challenging/competitive and better paid than programming.
You explain with discrimination (which was real in the 50s according to most evidence we have) what is in parent's case better explained as a difference in motivation (making a five-figure salary by being responsible for humans is more attractive to the average US woman than being responsible for modules of code is).
Your secretarial school figure is a strawman to make the parent post look like a strawman. There's a legitimate discussion to be had on why women nowadays are found in a higher proportion in medical school and to law school than to CS, and there is a multitude of reasons that are more plausible than purely discrimination. Let's start to tease them apart without merely stopping at the clichés.
You explain with discrimination (which was real in the 50s according to most evidence we have) what is in parent's case better explained as a difference in motivation (making a five-figure salary by being responsible for humans is more attractive to the average US woman than being responsible for modules of code is).
Your secretarial school figure is a strawman to make the parent post look like a strawman. There's a legitimate discussion to be had on why women nowadays are found in a higher proportion in medical school and to law school than to CS, and there is a multitude of reasons that are more plausible than purely discrimination. Let's start to tease them apart without merely stopping at the clichés.