This decision seems illogical to many commenters here, but I assume the decision was made by professionals with all the data in front of them. Which then raises the question, why did these professionals make a decision so different than the "obvious" opinion here?
People on this platform, I assume, are familiar with the scientific consensus on these topics and generally side with the science. But one has to understand, that these decisions are not made directly by scientists but by politicians who have scientific advisors. And as politicians, they will factor in a lot more than just the hard science on a topic, which can result in seemingly unscientific decisions that go again…
It should also be noted that Denmark has a relatively low infection rate, which is probably why politicians has decided not to interfere in the decision.