I don't follow - why do you think HR would be interested in shiny hot new web stack keywords over anything else?
Also, let's say team A (10 C app/systems programmers) in a company asks HR to look for a C developer and HR comes back to them with 10 great web developers to be grilled by the engineers of team A - what happens then? Does team A shrug and say "welcome to our C codebase, we shall now rewrite it in tailwind or whatever because you are now here!" - I really don't see how it can play out