It is fundamentally impossible to know whether we live in a "simulation". The concept itself is a notion connected to contemporary culture based on certain tech

It is fundamentally impossible to know whether we live in a "simulation". The concept itself is a notion connected to contemporary culture based on certain technical knowledge, and thus the definition of what a simulation is isn't absolute, but rather subjective. It follows that not much objective can come from this biased root assumptions. In many ways physics is theoretical nowadays. You can look through the list of theories in theoretical physics and realize that it is all a giant construct. Physicists can spend their entire careers with illusions, which is ironic as physics supposedely is about reality. At the end of his career, Albert Einstein said: "I think it's entirely possible that physics can't be based upon the field concept, i.e. consistent structures. In this case not a single part of my cloud-castle remains, including the theory of gravitation and all the rest of modern physics."