I don't see what's so unbelievable about it.You can learn to become a god-like warrior or mage in a matter of months, so what's so unbelievable about being a master smith? You could be a mage and become a master alchemist .And what does this have to do with the sims? When in the Sims do you ever forge a blade then kill somebody with it? I don't want forging for the sake of forging. I want to make the armorer skill more useful, while also being able to make weapons and armor and make some money selling them or just using them myself.
Combat is something you are naturally talented at (as the hero), but I'm not a huge fan of "nobody to greatest" stories either unless it's a distorted timeline. For an example of an origin I liked, in Mass Effect you started the game as the most badass human soldier in the alliance, you were "level 1" but that's just game mechanics.
Like I said a few posts ago, making some weapons and armor wouldn't be bad provided your character was talented at it and was a high level in armorer, but you shouldn't be able to make the best quality gear.
So ignorant it's not even funny. Using your logic, we shouldn't do side quests. How did the Dark Brotherhood help us save the world? Oh and remember the hours (if you did) picking flowers. And yet, with picking flowers and plants, people find fishing, mining, and other resource gathering ideas illogical. More like these people are close-minded.
The Dark Brotherhood helps you gain unique skills that helped you save the world.
Picking flowers doesn't require years of apprenticeship to become good at it.