if it was intended, then metal would be portalable. You can rant about “b-b-but the devs didn’t say it was,” yet the fact remains that it only exists as a consequence of not tying users to worlds. It’s as much of a cheat as clipping into swamp crypts using a chair before you get the key. If you can‘t clear your conscience without knowing if the devs have ever written in verbatim that it’s cheating, then I suggest you don’t do it at all, because it sounds like you don’t want to cheat.