That’s the point of LfD, Titan! D2 lore is deep and a lot of people don’t feel like reading book-long lore entries, thus Lore for Dummies.
[spoiler]Actually my in-game idea for LfD was to inform Guardians about their enemies to be able to eliminate them better. For example, if a Fallen skiff drops three Servitors with a small detachment of foot soldiers in the Tangled Shore, if you know that the Scorn HATE Fallen machinery, you could expect a swarm of Scorn soon and you could set up an ambush for them. Doesn’t work very well in game but I like the idea.[/spoiler]