Master's plan wasn't nonsensical, nor was Enclave's.
Master wanted to unify the people of the wasteland under one idendity to get rid of humans working against one another because of superficial differences.
Enclave believed that if "humanity" is to recover then they need a clean slate so that they can work towards restoring the world in peace without mutants interfering(?).
Both, ultimately, ended up being quite sinister and evil. But they were hardly nonsensical.
Yeah, but honestly I think it is about time to pull back the curtain and reveal at the very least 'some' info about 'why' Vault Tec performed experiments that would be detrimental/harmful/lethal to the inhabitans of those vaults. I mean, we have a vault where political parties have to sacrifice someone to robots. Ok. Why? Why was this experiment created and for what reason? There was a vault where a constant white noise caused the inhabitants to go crazy. Ok, why? Surely they must have performed some sort of test on mice or something beforehand and saw how harmful it could be and they decide to do it to thousands of humans in a vault? Why?
Vault 12, I get. It was simply designed so that Vault Tec could observe what exactly happens to the people inside when the vault door failed to close, if they lost contact with another vault after the great war then this could be one of the reasons and at least they'd have the research data of Vault 12 to know what might've happened and whether or not it is worth to try and restablish contact or even find this vault later on. As well as to observe how radiation from the bombs would affect the people. Now while the latter is inhumane it isn't nonsensical as Vault Tec would be very keen on knowing just how people from other vaults might be affected if they became affected by the same amounts of radiation.
Vault 15, I get. It was simply meant to see how people of extremely different ideologies and cultures would work together. It wasn't any more sinister than that. And in the end the collapse of the vault was because of the inhabitants themselves.
Vault 8, I get. The point was to see how a community, once given incentive to go out, would establish themselves in the post-apocalyptic world.
Vault 21, I get. The inhabitants were given a means of how to settle disputes, gambling, and whatever followed would be from their own choices.
Vault 22, I get. A scientific vault, simply meant to continue researach.
Vault 87 even, I get. Same as before, except less humane with its research.
There are vaults I can totally see the point behind but there are others that just feel ridiculous in their design. Cartoonishly sinister. Only vault from the original games that could be argued that it was "cartoonishly sinister" is Vault 12. Ultimately though, I'm left wondering 'why?' with everyone of these vaults, even the ones that make sense. What is the purpose?
Sure, there are times for mystery in a setting, but we're 5 games in and we're going to get our sixth this year probably. It is time to toss the fans of the lore a bone, even if it is just a single bone from a hand or a foot. Maybe if they gave us a vague explanation for the reason behind the vaults the nonsensial ones would be so nonsensical. But I fail to see, at the moment, how whoever is in charge of the vaults (if they're still around to begin with) is going to gain anything worth a damn from the cartoonishly sinister vaults.
IIRC one of the lore-bits from Fallout Van Buren was that the people behind Vault Tec were going to use a spaceship to travel to a different planet or something far far away and they needed to know every possible scenario that could play out while onboard the ship that could prevent their journey from being finished. Now while this plan is silly to me at least it'd explain a bunch of things. What if a part of the spaceship started leaking radiation? Vault 12. How would people of vastly different backgrounds work together? Vault 15. WHat would happen if the radio's and speakers on the ship started emitting a white noise and what if that white noise carried subliminal messages, would it help control the citizens on the spaceship? Vault 92.
I don't think the spaceship is the best idea to make sense of the vaults but at least it is 'some' kind of explanation for why Vault Tec would perfrom certain sinister experiments 'at all'.
*sigh*
TL : DR
I want an explanation for why the sinister vaults are not nonsensical in the first place. Preferably by giving us some answers behind the motives of Vault Tec creating these vaults in the first place as the current answer of "vaults were never meant to save anyone" is a crap answer. We're on the sixth game, it's time to answer some of the mysteries.
Because a vault is an equivalent to a regular cave or a deteriorating ruin.
Ok