It really isn't a stupid question. There's a lot of Fallout technology that doesn't make sense to me, mostly because the writers don't care about realism for all the obvious reasons.
They have fairly sophisticated AI's on supercomputers and GPS functions on a PipBoy, just to name a couple of examples. But they're still using reel-tapes, vacuum tubes and whatever the heck holodisks are. So their computer technology is surprisingly powerful despite how bulky it is.
Once you have Bethesdaverse, then you have
personal computers sitting on desks. Ignoring the fact they're still working after all that time, that strikes me as anachronistic. As I think the notion of a Steve Jobs or Bill Gates style PC revolution is completely unheard of in their timeline and that cultural mindset is completely alien to them.
I would've otherwise assumed computers would've been purely used for academic, military or for specialized engineering tasks (e.g. nuclear reactors and running the Vaults). And most business offices handle clerical tasks in large rooms with ladies and gents sitting in rows at desks in the style of assembly-line or a mass-production. Documents go in, you do your assigned tasks for the day, documents go out.
Of course, if they can make miniaturized fusion cells and fission batteries, one wonders why they didn't just make a smaller battery and pull the power off a grid powered by fission. But to be fair, while uranium is common, not all of it's the fissible U-235 isotope and not all ores are equally high grade or accessible. Australia apparently has the lionshare of the good stuff. And while "relatively" common, we've overthrown governments for less. (Chilean President Allende nationalizing copper mining, amongst other things.)
http://www.world-nuclear.org/info/Nuclear-fuel-cycle/Uranium-Resources/Supply-of-Uranium/
So even if they didn't fight the war over oil, then they'd probably still have other Resources to fight over. You dig up all the high-grade easy-to-reach stuff first. Once that's starts dwindling, the infrastructure and market gives you incentive to go after the increasingly harder-to-get-stuff.