Give me OSR concepts world builders should address

The title. Assuming the baseline fantasy or fiction is something between OD&D, BECMI and B/X, Im trying to come up with a list of concepts and questions that if you're writing for an implied setting, what are conceptual blind spots that need to be addressed and accounted for?

A couple of examples:

If you have a Catholic-esque religious organization, how do they politically view direct but magical (may include clerical, but assumed arcane) healing?

Specifically, who makes magic swords/armor/potions? What is the exact process of making them?

If a legal organization, such as a the city guard, acquires a wizard's spell book, what typically happens to it?

(Just about any question about most Monster Manual creatures)

Im not asking for answers to these questions. Only additional questions to answer for writers and worldbuilders to answer ourselves.