CubicsRube
Hero
I think driving it for me is that one of the things I always wanted to represent was the kind of different social strata in a game and how different characters may be better at working within those groups.It's not about stronger/weaker. It's about more/less appropriate. 5E by default doesn't do the sort of granularity that works well with this kind of thing nor let people have social skills that make sense (someone good at Persuasion is good at it in all circumstances, for example). DMs can apply Advantage/Disadvantage, of course, but it can seem like overkill, or just not quite right. I believe there is some sort of optional rule re: backgrounds that might help here though, but perhaps I'm thinking of a house rule.
If you have someone born and raised on the street, they're more likely to have mannerisms, figures of speech etc that will make them more socially adept at talking with other unfortunates as opposed to people that were raised as aristocrats, or wealthy merchants etc.
Whether or not they have innate or developed social skills themselves personally, their lingo, body language, and general presentation should could for something I just don't know how to map that in the game.