Unimportant countries? That’s xenophobia you know. Every country is important to the people living there. Region locking doesn’t matter because the servers are not really dedicated in one region, e.g. the EU server is not hosted in Switzerland - for example -, they are all on the same place. This would only change if they had teams in different regions which they don’t. There’s only Korea and everywhere else. Getting region-specific servers is a huge advance.
Also, if I’m learning another language and I want to practice I might decide to enter a specific server where I know people speak that language. Region/ ip blocking would fix some stuff, but on the long run, when hype dies down and server merges start to occur just like what happened in Ragnarok Online those people in “unimportant” servers and countries might be the majority.