That's something I've seen getting much worse over the past decade with the proliferation of frameworks. What you call "getting up to speed" is tempting to call "playing with". People work with tools that they have no knowledge of. Learning on the job is good, but I think one should have at least an idea of how the tools are supposed to be used and how they are implemented before doing anything else than throwaways.

I don't know how to fix it really, it more of a cultural thing than a technical. Knowledge must somehow be cool and respected again. Or maybe I'm just getting old and this is really a faster way of building things. I just can't think of any other area where professionals jump to the next tool without even learning the one they use.