Why is there such inconsistency between dungeon and raid loot?

[Froomstbolt-stormrage]

@Mikuki-scarlet-crusade

Used to be that some achievement rewards were tied to running a +20 but now you can obtain things like KSM without ever going near a 10.

I haven’t played at all this season, but the idea was that a current +10 is supposed to be equivalent to last season +20.