In keeping with what
@DANDAN_THE_DANDAN says, the fantasy genres are awash in imaginary skills. Tagging every instance of a story in which an imaginary craft had significance would render the tag virtually useless. (The original post included
alchemy as a craft; and, while chemistry forked from alchemy, alchemy itself was and remains largely a theory of magic.)
A “Crafting” tag might be
conventionally defined to exclude skills that do not exist in the real world, and perhaps also to exclude skills for which other tags already exist (
eg, “Cooking”). However, there would then be some question as to how to handle
magically augmented skills which correspond to real-world skills. And I'm not sure that there are enough stories in which real-world crafts (
qua crafts) play a significant rôle to justify the existence of such a tag (though I happen to follow at least one such series); perhaps someone might cobble-together a list of such stories.