What fear is “The Belko Experiment” trying to express?

Assuming that this just isn’t torture porn, that is.

https://www.youtube.com/watch?v=qZNfwayNLL0

I mean, the scenario starts off as absurd and doesn’t get any less so as the trailer progresses.  It’s like a heavily modded-for-extra-gore, real-time version of a Vault-Tec experiment, sure – but the Fallout series never bothers to try to justify those experiments, mostly because there’s no real justification for them.  So what fear is The Belko Experiment trying to face?