A major reason why regions like KR, JP, and LATAM all only have one team is that they only get one slot, so new teams aren't given a chance to get experience outside of their region and new orgs (other than in JP b/c of viewership) aren't willing to invest
Look at what BR was able to achieve because of getting more than one slot, they still have mostly mediocre teams but the region is alive due to a boom in org investment, possible due to not having to only play against a superteam like LOUD for a chance at a singular slot
I'd argue that if teams like ONS and Leviatan, who are at worst the same tier as NiP, were able to attend a LAN, both regions would improve massively in both skill and investment