24y isnt entire humans lifetime ...
Nor is 36, 48, or 60 ... and your character can be litteraly anythng in between all of them.

You are taking it from wrong end ...
If you will look long enough, you allways find some way this or that will be impossible ... instead try to think about how to make it possible.

In FR, average human lifespan is the same as ours. Characters look about 25-30 years old, so for human characters their looks should correlate very closely to their actual age. If they spend 24 years on building a fortune, they should have started - pretty early, yes. And such a remarkable individual definitely should be recognised by Duke's advisor on sight, because Baldur's Gate isn't that big, population-wise. It's not a Shanghai or Mexico City.
Ragnarok, stop nit-picking at my words, please, it's not funny anymore. The topic doesn't worth it. I don't even understand which point you are arguing
for. I'm pretty sure that, whatever goofy nonsense Larian will come up with, their fanboys will swallow it regardless.
So, because I'm nearly 60 now, I'm dead already? My, won't the people around me be surprised. It's going to be really hard to meet my mom for lunch tomorrow too, since by default, she's older than me, and so must also be dead already.
All the "you can't be Noble and a Street Urchin" crap is cracking me up too. Maybe because I'm fresh out of running a Human Noble rogue in Dragon Age Origins? Maybe I'm remembering my Dwarf Noble rogue? I'm not sure why people want to place all these limitations on themselves, and then blame game developers for their own short sightedness? Like the comment above that's going on about how the Origin characters are going to get all the love if Tav is rolled, completely ignoring the fact that the main game's storyline is Tav's story, if there is a Tav. If there is no Tav, it's irrelevant. The main game must progress and will through whichever Origin character one chooses to play as. But it will also advance, and add depth to the Origin characters, if one plays as Tav.
I've already read the "but they put all this time into the Origin characters" spiel, and I look back at all of the games with companions and wonder if this is the first game with companions that those posters have played. Just a few, off the top of my head, where the comps have some rather detailed backstories: Dragon Age et al, Mass Effect et al, Kotor et al, Fallout 4, Baldur's Gate et al, including the current offering. Go ahead and play ME 2 and skip the companion missions, and see what happens, it's fun, really. "But you can't play as them" is irrelevant, when you're playing Tav. Reading all the stuff about shoehorning characters into a backstory, I'd think it would be a relief to have Tav not be shoehorned, but hey, it's the internet...