>>715518267 (OP)>Hoover Dam is the problemNo, it's actually how the game utterly breaks down beyond any reason if you don't do sidequests before arriving in New Vegas.
It's actually very Witcher 1 in that regard, because Witcher 1's "sidequests" are not sidequests at all, even though conventional gaming logic might suggest otherwise.
The sidequests in New Vegas (focused around the various factions) are one hundred percent not-optional for the story to make sense. The NCR would not trust you as far as it could throw you if you were not helpful, and if you were actively hunting down and dismantling Legion operations in the region (which I've been doing because fuck the Legion), they would not trust you either, and surely not trust you enough to stride right over to the big man's tent to discuss the chip. He even asks you, point-blank, to your face, why he should trust you.
I'm not going to suggest that New Vegas is an awful game or anything, but if you don't play it "correctly," a lot of the cracks become very apparent from a narrative perspective.
And that's not even considering how you have zero intrinsic motivation to help anyone. I suppose that's fine for some people who like to headcanon everything, but the Courier is literally just a Courier with no reason or incentive to put himself (or herself if you're a tranny kek) into any danger. You can voice contempt or a desire for retribution on Benny, but why do you care about the NCR? Or the Legion? Or Mr. House? You've got a lot to lose (your life) versus very little to gain (infamy? noteriety? caps?), whereas in Fallout 3, even though "what do they eat" has become a really overused meme question that is wholly unserious because it's an unimportant narrative detail where the response is as insipid as the question ("food, you fucking retard"), you have a motivation to find your father from the jump, and even if you refuse to look for him, it still makes sense narratively.
Just my two cents.