Theory

I think Silo 1 has the key players under cryonics in order for them to survive the apocalypse and be in control throughout the nuclear winter and get to the other side (could be they get out of it for a few days per year to see how things are going).

If this whole thing is an experiment / reset for humanity, would make sense for them to want to be able to live through it (+ will be good content in later season for both character groups to start interacting)