Well, yeah, but it's been done. What if everything that's happening occurs in a
Boltzmann brain? What if the characters appeared ex nihilo due to some fluctuation in their current state, fully formed, never having lived on Earth? What if the show is not set in a computer after all, but the whole place, including the characters, was formed through overwhelmingly unlikely quantum fluctuations? What if that's the case, but the circus, the computer/CGI aesthetics, Earth, and the entire real universe are a shared hallucination, and the characters are in some other environment [0]? What if the computer/CGI/web show aesthetics/trappings are a distraction and it's actually set in a non-normative rationalist web fiction? What if it's in the imagination of a chronically ill child in a hospital? What if it's set in a prediction branch of a badly-programmed ASI system attempting to acausally bargain with non-existent entities[1], inadvertently creating and killing trillions of human-like entities [2]? It's probably not worth speculating about, I don't see much of an indication this is well thought through by the creators of the show.