Criticism of Simulation Argument

Some transhumanists argue that if every superintelligent species would create many simulations of entire universes, the chance of us not being in one of them is much smaller than that of being in the real universe. The problem with the simulation argument is that it assumed that superintelligent species would need to create simulations of entire universes at all. Using that much bandwidth would just slow down the process of finding out whatever they're studying in the simulation, and more bandwidth would just mean a great number of studies, not just more bandwidth per study.
They'd use simulations for much the same reason as we're doing with our own supercomputers, only better. If they'd have to study a system made up of sentient beings like ourselves, the model they'd use would still be made up of simplified units that follow certain rules: reproducing every single atom would be a waste of bandwidth.