I'm Danish, but how is this terrible? I should show these people a video of my twins sleeping in a snow covered trolley outside the bar I was having a beer and a board game by the window at.
When I first moved to Denmark, I marveled at the babies in unattended carriages parked outside the grocery stores.
You totally should do that, as long as you can't be doxxed. I would love to see the reactions from self-righteous Americans.
The only terrible thing is the food they're having.
In Copenhagen I was strongly adviced not to leave my bicycle unlocked outside, for quick visit at a grocery store. Everyone I know takes their bikes home overnight.
Danes being willing to leave their kids unattended outside, as good as it may be in practice, is a horrifying idea to people in the US at least, and is liable to get Child Protection Services called on you. Different culture.