If I'm already in a simulation, that's a different story. A fait accompli. At the very least I'll have an empirical answer to the burning question of whether it's possible for me to exist within the simulation, though I'll still have no way of knowing whether I am really the same person as whoever I am simulating.

But until I find a glitch that makes objects disappear, render in wireframe, etc. I have no reason to give simulation arguments all that much more credence than heaven and hell.