Argus is the legion homeworld and is pumping out any demon we didn't perma kill. We killed small fractions of the legion in bc and Legion(excluding argus). The whole army of the light ends up being a handful of draenei and 4 non-draenei. You don't think that is underwhelming especially when we deal with small portions of the legion in multiple expansions and it takes us longer to deal with them then the legion homeworld?