If we're living in a simulation, why would the simulation creators allow the sims to ponder and speculate whether or not they live in a simulation?

If we're in a simulation, it's probably a massive universe-spanning one. We're just a blip, both within the scale of the space of the universe and within the history of time of the universe. In that case, we're not important enough for a simulation creator to even care to adjust our capabilities at all. They're not watching us. We're not the point of the simulation.