*~*
It's not a self insert, but doing that thing just seems...off? It feels like I am willingly writing a loophole, it doesn't fit well with me
It's not a loophole, because literally everybody would notice if they were in a different world. It's far more uncommon to not notice. Even before I knew what anime was, my parents taught me about the constellations. If I looked up and didn't see a single one I recognized, or noticed unusual patterns that would have had names if they'd existed before, it would be obvious that I was on a different world.
Everyone has little things that are familiar to them, and if those things vanish, they will notice
immediately. Maybe they won't know why they're panicking, but they would.
It does make some sense if you happened to get dropped in a place that has the same flora and fauna as Earth, the same color sky and sun and moon, the same language. But that's far too many coincidences. It's impossible to get them all right, and if you're in a simulation that's an exact copy of Earth, even then, it would take sooo much effort to convince you that nothing is wrong. The only way to pull it off is if they woke up in the same bed, used the same toothbrush, interacted with the same people they always do. And that just isn't how Isekai normally works.