>>537810183
>literally everyone and their fucking grandma would want to capture their factories for personal use
Not if you have enough manpower to protect them against everyone except the biggest players, like the NCR (who would be your biggest client at this point). And while they clearly don't have that in their New Vegas branch, it can be explained both by videogame constraints (after all, in-game New Vegas looks nothing like the one in prologue comic) and with the place being rather new.

Besides, I don't see NCR regular military even existing without weapon production capabilities, otherwise it would've been as rag-tag as Legion (who I believe do not have those, at least en masse, which is why their weaponry is so diverse).