Dr. Awkward said:There's a pretty good answer. Being an adventurer is hard work, and it's easier to just make shoes.
"Hard work"?! Yea, I'd say losing your nose to frost bite, getting the plague in a foreign swamp and having your nuts snipped off by the King's executioner because you were in the wrong place during an attempted coup is "hard work".
"Easier" IMO doesn't do it justice. First of all the skills required are peculiar - especially in the case of a rogue. In fact you could be a "rogue" in real life, I doubt the reasons that you're not have something to do with being lazy.
Plus, players of the game ingore all of the hardships and realities of such a life. Players come with a built-in background that gives them their skills and yet doesn't include any of the demeaning possibilities inherent in such backgrounds. The players are also handed relatively morally-pure quests with an assumption that they aren't going to be annihilated in the first encounter. In short, basically the only reason that players pretend to be adventurers is that IMO it's nothing like real life, and anyone who is too critical of commoners for being lazy should be made aware of this.
So your choices could be
1. Join the army, get stationed on a border and learn nothing for 10 years except how to survive scurvy.
2. Join the thieves guild, get arrested on your first heist because you don't know what you're doing and have both of your eyes put out.
3. Be a farmer, earn an honest living, sleep on a bed, get married, and live in a village full of people that like you.