I would really only call no. 5 completely true when it comes to Denmark! We were very quick (and apparently good) at shutting down and thereby stopping the spread, keeping it away from the elder.
The preparation was mainly done while the number of cases was very low. It seemed like a lot could have been ready beforehand. Don't get me wrong. I'm sure plenty of countries are less capable of handling a pandemic than Denmark, but in the beginning it did not feel prepared.
Almost 70 % of the positive tests in Denmark are people below 60 (one of the main groups tested are people in health care and eldercare and people needing these). Less than 10 % are 80 or above where the death rate is quite a bit higher than the rest. That's the key to the death/recovery rates. And sure that can tell a lot about different strategies, but..
We can do a lot to prevent it, but we cannot completely take luck out of calculation when it comes to recovery rate. That's one of the main reason for the death rates in Sweden, where they haven't done as good a job keeping the them safe (just below 25 % of positive cases in Sweden are 80+). They have slightly lower death rates in 90+ and slightly higher in 80-89 and 70-79.
I have no doubt that more testing makes opening up easier