People want to climb, so rig this it must be something right? Yeah, it's 13b.
They just love slinging trees high, vastly increasing the leverage on the tree. Your webbing is not a rope, it is rated for climbing as a loop, not to mention being really prone to cutting.
Apparently, this knot prevents you from doing a face plant in the dirt.
The flying anchor is rarely a good idea.
Then he used all his cams and a cordalette when there was a lot of beefy static rope to make an anchor.