"Wow, you invite me over and don't even offer a cup of tea, and now I have to watch the door for you," Gu Shanhai felt that the Holy Saint really didn't treat him as an outsider. After all, this place stored plenty of hidden and precious tools, equipment, and so on. Yet, he just up and left like that.
It might also be because he simply found these things meaningless.
If we're talking about getting over the crisis of the Great Ruin, then there's a high chance that the Saints would be reascending to godhood, so these items would indeed become nothing more than possessions external to them, and Gu Shanhai was welcome to them.
If they failed and the world ended, and everyone died together, then these things would be even more meaningless. Therefore, to a Saint, wealth was nothing but a fleeting cloud.
This also showed that gods seemingly didn't need resources, not even faith.
