My sister-in-law (girlfriends brothers girlfriend, not that it matters) recently studied for a data analytics certification. Actually several. The entire course (located on here: https://medieinstitutet.se ) is based on Google Analytics. Now her entire value is tied to the use of Google Analytics, she will almost certainly fight very hard to ensure that these skills remain relevant, nobody would want to retrain for 6…
You can learn the most generic course out there and still turn out clueless, you can also learn the most specific tool and come out and be able to generalize. As far as I can tell this depends entirely on the individuals ability to be resourceful. In that respect a GA specific course might help them Get their first job faster so maybe that’s not a bad thing at all.
Getting this background requires a non trivial amount of time. It's easy to take our ability to generalize different computer based tools when you already understand digital computer architecture and know a few programming languages. The vast majority of people do not start from such a broad base of knowledge when choosing some software tool to learn.