Wood Elves: Worldroot Pathway (Outpost building) is Useless?

[SPARTAN VI]

Am I missing something, or is this building useless?

Worldroot Pathway supposedly applies a 30% reduction in recruitment costs for local armies. However, as an "outpost," only global recruitment can occur in that province anyway and I've confirmed this 30% discount doesn't apply to global recruitment. So what's the point of this building?

Building I'm referring to:


Cost before and after are the same:


(Edit)

NM... Apparently the discount only applies specifically to that settlement, not the entire region. E.g. that outpost was built in Aquitaine, which is a minor settlement in the Bordeleaux province.