Merit has little to do with social choices, though. Just look at how often "cultural fit" comes up in discussions of hiring.
You are imagining an idealized utopia. The problem is, we don't live there. Unless hiring is done purely through objective tests that have been tested for bias and normalized there will be social-status factors involved. Coping with those lets us get much closer to a merit-based world than pretending they don't exist.
Imagine you had some code but a system-level round function was broken: it rounded up on 4-9 and down on 0-3. You can't change the function without changing the entire operating system. Would the best approach be to say, "I don't think we should discriminate! Round functions should behave correctly!"? Or would it be to compensate for the known flaws while working to change the system-level issues?
And in my chair, 100% of mobile engineers are female. Woo hoo.
Now let's move on to your article. So much material there, where to begin!
We are feminising medicine. It has been a profession dominated by white males. What are we going to have to do to ensure it retains its influence?
Oh no, what are we going to do to ensure that medicine remains dominated by white males?!
There is a tsunami of women coming through.
Aaaaahhh... TSUNAMI! SOMEONE GET THE LIFEBOATS! Nope, doesn't sound hysterical at all.