That's basically the entire crux of the argument, yeah. "This thing should be pointlessly and frustratingly difficult to gate people who aren't as dedicated and as hardcore as I am out of it; this way, when people like me do throw themselves at it for long enough, then it's impressive when we complete it, and then I and people like me can hold its related subsystems hostage."

So of course it's frustrating to them when there are so many well-documented avenues of how to learn how to do it, because now there's no frustrating endgame, no barriers to access, just, if you want to craft, then craft. If you want to gather, then gather. It's the same for anything in this game- there's no lack of available guides or resources for learning ANYTHING in FF14 right now (with the possible exception of desynth, which I'm sure we have a litany of memes of dubious credibility about market barons scrubbing wiki resources free of the relevant information on) and that's in itself a point of contention to the 'hardcore.'

It's not even as if those barriers would conceivably vanish with harder, more difficult recipes, because people will still be sharing and theorycrafting ever superior rotations, and so crafting, which has no execution-based skill barrier gating it other than the requisite motor skills required to type 'ffxiv crafting macro 5.2' into Google? It will continue to be easy, leaving the 'hardcore' crafters to engage in the only meaningful pastime remaining- market board PvP.