I find it hilarious, though, that people are open to this possibility but so hostile to the idea of creationism.
If you ask me, it's the same shit in a different package. Throughout most of early history, man had a pretty bad understanding of scientific principles and "God made everything" was an answer that fit what was observable at the time. As advances in scientific understanding were made, we've come up with theories as to why we're here that are have a higher likelyhood of being true based on observations (the Big Bang, for example). It's also just as likely we were observing some advance's alien race's fireworks show that predated our known universe, but just because that fits the observation, does not mean it's true.
For example, if I put you in a completely darkened room and you heard meowing, would you know for absolute certain that there was a cat in the room? It could've been a recording of a cat, a person making a meow noise or even a parrot that was trained to meow. You could've said that "I heard a cat, so there is a cat in the room." and it would've fit your observation, but it could still be entirely incorrect. Likewise, these scientists may believe "the universe is a simulation" fits their observations. Just remember, until you can turn on the lights and see for sure - all that meows may not be a cat.