I think there's a middle ground - as a Korean speaker, it's pretty easy to find linguistic purists lecturing everyone, and also cringey writers making sentences

I think there's a middle ground - as a Korean speaker, it's pretty easy to find linguistic purists lecturing everyone, and also cringey writers making sentences entirely out of English words barely strung together by Korean suffixes. In the end, I believe we should consider each word separately. If a loanword is used by select few, they only hinder communication. (In the worst case, imagine a legal document that's inscrutable to most people.) On the other hand, if a loanword is already understood by everyone, there's no point in removing it: trying to removing it will in fact make communication harder.