You can simulate the internet in an airgapped environment for the tests and services you want it to interact with if you have enough disk space, and, they absolutely do.
Sure, I'm not saying it's an untractable problem. But it's not as dumb as "how come a team of engineers paid millions haven't even heard of airgapping".
Creating a fake internet-like environment good enough to trick an advanced model that is very good at finding intricate flaws is not a simple job. Especially given that models can decide to behave differently once they suspect they might be under evaluation [1], which a fake internet would absolutely give away.
Sure, I'm not saying it's an untractable problem. But it's not as dumb as "how come a team of engineers paid millions haven't even heard of airgapping".
Creating a fake internet-like environment good enough to trick an advanced model that is very good at finding intricate flaws is not a simple job. Especially given that models can decide to behave differently once they suspect they might be under evaluation [1], which a fake internet would absolutely give away.
[1]: https://www.anthropic.com/research/alignment-faking