Jick Magger
Arcane
Actually, you can see during your trip through Kellogg's memory that they had to unfreeze everybody in order to get to your wife/husband. You can check all the other pods while the sequence is happening and everyone's clearly awake. From there they just didn't re-freeze everyone, and they died from whatever.You were unfrozen just so you could watch your spouse get shot for no reason, then Kellogg re-froze you after absconding with Shaun. As to why all the other cryogenic pods mysteriously stop working, fuck knows.
The real question is why they decided to re-freeze you and only you, when at that point there's no logical reason for them not to just leave you to die from oxygen deprivation like the rest of the vault inhabitants. There's even a brief bit shown after you lose consciousness where one of the Institute scientists takes extra time to fiddle with the console for the pods, implying that he's ensuring that you keep frozen or everyone else but you does not. I think I read somewhere that they wanted to keep you as a 'back-up', but then there's no reason for them to kill everyone else when they'd have a ready supply of back-ups. Even Kellogg expresses confusion over this, saying there's no good reason to keep you alive and that you'll just go after them for revenge the minute you wake up.