I agree that it seems more likely that if we're in a simulation, it's got a simplified version of our simulator's physics rather than some drastically different physics. On the other hand, this is very much guesswork.

And on yet another hand, if you assume that our simulators have huge amounts of computational power, they might be exploring universes with possible laws of physics thoroughly enough that the proportion of simulations with simplifications of the home physics isn't very high.

I'm faintly horrified at the idea of physics which is much more complicated than ours-- ours is complicated enough.