If scientists (physicists and the like) prove
this is a simulation, do you still think that wouldn't change anything? Would you still say "so what?"? Wouldn't the implications of such a truth drastically change human civilization? It's easy to say "No, no one would believe it or care" (or whatever) ... but I don't think that is necessarily true.
The coolest/creepiest thing I've read about this argument came from that VICE interview with Rich Terrile. It gives the reader a sense of the potentiality of this...
As scientists, we put physical processes into mathematical frameworks, or into an equation. The universe behaves in a very peculiar way because it follows mathematics. Einstein said, “The most incomprehensible thing about the universe is that it’s comprehensible.” The universe does not have to work that way. It does not have to be so easy to abbreviate that I can basically write down a few pages of equations that contain enough information to simulate it.