You can’t treat governments like they’re people. The same detachment from the human spirit applies as it does to any sufficiently large corporation, multinational, politburo, royal court, whatever.

Even if your specific nation holds your specific code of ethics and standards, there can be severe consequences to holding all other nations to the same standard.

Unless you’re a superpower, in which case you’re the oppressor, simply by engaging in diplomacy.

Given all of this, what you’re asking for is for one nation to have perfect foreign policy that would compel change in North Korea. Then, all other nations would need to adopt and extend the same policy, but independently and without external pressure.