It's a seemingly counterproductive cultural trait, but I note that it isn't simply a Danish matter, as you do also. I cringe a bit at my own reluctance to blow my own horn, and also find similar cultural imperatives throughout the world, at least where I have any grasp of those cultures. It seems something that is endemic to our species, rather formalized in Denmark more than elsewhere, but present ubiquitously to varying degrees.

Interesting because it sheds some light on society itself, and how culture necessitates some conformance to be able to fit in.

Thanks!