Content Warning
Sometimes I think that thanks to the inherent debt spiral #Traveller is better at diegetic explanation for adventuring than any of #DnD systems. I mean it basically forces you to adventure by how spaceships and debts are set and how it sets up all the things like jumps, worlds, where to buy stuff, how to make money, patrons and pirates.
I think if you worked on feudalism as Coins and Scrolls does it you'd have diegetic adventuring more like Traveller than DnD.
https://coinsandscrolls.blogspot.com/2017/06/osr-death-taxes-and-death-taxes.html