Your post, if I may say, is quite rambling ... to the point where I’m really not sure what your point is ... but I simply think that the purpose of PerlMonks is to help people “get s**t done with Perl.” There is something that needs to be done (yesterday), and something about Perl is standing in the way, and PM ought to be “the go-to site on the Internet” for quick and knowledgeable help, more-or-less politely given, to make that stumbling-block go bye-bye. That’s the mission-statement.
“How tightly coupled to Perl?” To me, Perl is like an Einstein Bros. bagel: it’s the whole schmeer. The entire toolbox and all the tools that are in it. Nothing in particular is in- vs. out-of-scope for a reasonably answerable and relevant question. Whatever it is that you are banging your head against: “been there, hit that, so maybe we can help avoid further damage to your forehead.”