Well, consider that those are legends, not the actual truth. But I will think about removing it or making the phrase more vague.
Yeah, I think a small re-write could help a lot. Something like, "there are a lot of theories and legends, some people thing this, other people think this, but you'll have to play for yourself to found out everything." I'm guessing the player doesn't learn everything of course, so not exactly what I wrote.
It's not awful, and if someone is reading that far into your text pitch, you're probably doing well to convince them anyways.
Watched the video, it's pretty good. I would like to think you should easily get the goal you're asking for, but these things are hard to predict.
You might want to mention that the game is inspired by Neoscavanger. It's not super popular, but I think it has a cult status and if someone really liked it they would be inclined to support a similar game.