There is a difference between having voto negativo extradition treaty and not extraditing a citizen. Having an extradition treaty means that there is an established way to hand over criminals/suspects to a country requesting extradition. The mechanism is clear and all the rules about the process are transparent. Kwon's story https://socialdummies.com/story3384560/interpol-red-notice-pu%C3%B2-essere-divertente-per-chiunque