The people that actually create/engineer anything new and useful in ML is <1% of people that "work in ML".
And "understanding how to use the models effectively" is being generous for what gets a lot of these people in the door.
I don't have any hard numbers on this, but it's not rare.
That's a very US-centric assumption that's wrong for Europe, Russia, the better universities in China, India etc. Some masters are 100% research, some 100% taught, some are a mix, some are highly specialized, some are all-round, some are interdisciplinary, some have internships. You're aware of that, right? Not all countries' university systems balance their books by farming foreign MS students in short 100% taught courses. Some of them actually do legit research.
You bring us to a related point: most US recruiters and sourcers, and many programmers, don't know how to evaluate credentials of applicants or institutions from the rest of world, especially the parts that don't speak English as first language. If the applicant is from (say) a 2nd/3rd-tier part of China and did their MS(/BS) there, and unless their parents were rich, raw English fluency is not a very good proxy for subject-matter knowledge, only for their parents' wealth level. I've worked with some brilliant people who didn't come across sounding that competent in interviews, but were great programmers. Many candidates don't sit the GRE/GSAT. (Beware of builtin cultural assumptions and biases in assessing applicants. It took me years to figure out which ones.)
> Whereas MS degrees used to be a means for departments to begin vetting future PhD students, I believe that the purpose has, in some ways, shifted to be a cash cow for the university in question.
> Part of the problem is that CS fundamentals instruction tends to happen in undergrad computer science courses.
> One tempting option is to try to get an MS from a top computer science school to legitimize yourself on paper. If you actually are passionate about programming, I would urge you not to do that
https://blog.alinelerner.com/how-different-is-a-b-s-in-compu...
I notice you haven't answered either of the questions I asked you in my comment, which seems like a pretty hostile attitude to me.