This is not good logic. None of the other kits are particularly fantastical.
I mean, you're welcome to interpret it any way you like. I tend to get over-realistic about black/bladesmithing in my games because I'm into it IRL. But I'm not going to start complaining on the forums about the unrealistic encumbrance value of a blacksmith's kit. (Caveat: I don't actually know what the encumbrance value of a blacksmith's kit is.)
But you're trying to bludgeon everybody into submission with your opinions. Or it seems that way, anyway.
I mean, these are facts. We've seen some truly ridiculous and ill-informed assertions about how things work here, and those assertions have been based on real-world stuff, just really silly though.
The problem is that there are two kits which cover the same ground, except one covers slightly more. Neither is actually plausible for high-end forgery, and either would do for low-end forgery. It's like if "Swordsmith's tools" were totally a different proficiency from "Blacksmith's tools". You'd probably be complaining about that.
I like the idea of fantastical stuff that makes forgery harder, but it doesn't even interact with the problem I'm discussing, which is of overlap, because the forgery kit can't cope with that stuff, based on its description. And let's be real, in most fantasy settings, about 95% of what is happening is mundane, including most forgery.
To me it feels a bit like you're angry with me because I know a lot about this sort of thing and care a bit about it, rather than anything else. I can understand that, but I just don't hold with this idea "It's fantasy so the tools for this mundane task will inherently be different and impossible to judge". In some specific settings, that will be true, for sure (Earthdawn probably, for example), but in others? Not so much.