Judging from the reactions here, doing something for no apparent reason has become quite a taboo. But why? In German, there is a special verb for this, "flanie

Judging from the reactions here, doing something for no apparent reason has become quite a taboo. But why? In German, there is a special verb for this, "flanieren". When I look it up, I get "to dander", which seems to be the root for "dandy".