The reason the Nordic countries top these list is because they have things like good working conditions, time for yourself, overall decent education systems, relativly low bureaucracy, universal healthcare etc. If you're in the US you can change jobs until you find one where they respect you, pay for extended vacations yourself, move to a good school district, pay lawyers to handle things for you and have private health insurance.
What you can't buy is not having to care. That's what the Nordic countries are good at. You can focus your energy on the things that matter. You'll find a disproportionate amount Nordic people in almost all "digital subcultures", from e-sports to systems programming to startups.
This is changing in some ways. The Nordic countries are becoming more like the rest of the world with health care systems that are hard to navigate, high private debt and valuing status over substance. But it's still a very good place to live.
If you are a citizen of a country like Australia, the medical safety net is a life saver. No way will insurance pay for complete cancer treatments.