I am saying they are both a credible threat and many are amateurs. Those are not mutually exclusive.

You are talking about North Korea attackers from a theoretical point of view. For many people dealing with them is just a normal part of work. It's not an unknown that needs to be worked out logically from an armchair.

I'm saying this as someone who personally chatted with a North Korea persona that later tried to drop exploits on people, and the persona belonged to hacking group with at least one 50 million dollar heist. I've also seen the screenshots on many chats with North Koreans.