If we exist within a computer-simulated world, does our knowledge of this fact make our lives any more or less meaningless than if we were truly alive? I can’t imagine life being any less meaningful, but perhaps being part of a simulation might lend purpose to our otherwise purposeless lives through transference.
Personally, I doubt we are in a computer simulation. The people who believe we are just going through the motions in a facsimile of a world are probably grappling with their innate (and possibly unwanted) faith in a higher power which they refuse to call “god” but is certainly based in magical thinking and superstition, not empirical evidence. Instead of having delusions of God, they have delusions of simulation. They don’t want to admit to a belief in an all-powerful being so they gravitate toward this alternative, a simulated universe where we humans are not free in any real sense, where we, some higher power’s insignificant creation/program could be ended with the push of the power button, and therefore whatever we do in this simulation has no repercussions whatsoever.
If that’s not a belief in “god,” I don’t know what is. I only know I have no such belief.