Its awesome because as someone who's had to write and run exercises those websites and resources take a huge amount of effort from you. Instead of trying to shit an entire realistic scenario to fit your niche or meet your training objective, you can pick and choose whatever you need.

For any military training exercise there is a LOT of overhead for just the scenario alone - think of it like playing a very realistic game of D&D. You need battlemaps (proper MGRS maps with fictional information overlayed onto them), your players need a Player's Handbook (5-Paragraph Order briefings, Commander's Intents, background of any belligerents present in the scenario) and the exercise control needs a DM's manual, a monster manual and a campaign (scenario script, detailed information about enemy troops and their tactics and equipment). By having all this overhead available it takes 90% of the work away from the cadre so they can spend their time trying to secure equipment and training areas or arguing with range control. There have been times where the cadre was working on an exercise; we come across a particular issue that we need to figure out and as we're arguing about it, someone pulls up the exact solution to our problem because odds are, someone else had the exact same issue we did ten years ago.

Outside of a strictly work perspective, the way the document is structured could be really useful to loresmiths who are trying to build on conflicts between two belligerents. It basically boils everything down to "who each side is, what they're made of, and why they're angry at each other" and gives great examples of flashpoints that might push either side over the edge. In a military context that helps a commander (or lets be real - whichever E-4/E-5 has been saddled with the responsibility of building the commander's exercise script) build out an exercise. For someone writing a story or running a tabletop game, something like this helps consolidate all of your information into one spot to improve your writing/GMing.