The reason Xu Huo believes it's a tool rather than a prop is because the artist Jiang Jiang, also suspected to be trained by Doctor Zhang, whom he met in Zone 009, could also predict the future. However, her predictions were all related to the deaths of the people around her, even predicting her own death.
Although he's not too sure how Jiang Jiang predicts death, since such a predictive effect can be incorporated into props, it's naturally possible to turn it into a tool too. Perhaps at some advanced Wormhole Points, foreseeing good or bad fortune isn't too difficult.
Of course, this involves time travel.
The game Dimensional Rift can control so many zones and claims to shuttle through multidimensional spaces. Can it really not have the means to prevent possible bad events?
Perhaps there is something even more advanced and unbelievable than time travel.
But there's no need to talk about this now.