Also I doubt that the cold and wind part of uitwaaien as described by this non-native speaker is relevant vs. the fact that NL is just often cold and windy and that’s the only way you can get outside? :) I’m sure that the Dutch would do this on a sunny day as well if they could find more of them!
This article was junk, but yes Totally agree going for a windy bike ride along the canals or the beach, or a windy dike will certainly clear your head a bit, or allow you to think about things and feel refreshed. Any time away from work / stress to think will do this, though - it’s not a “method” to be used.
And we do sometimes set out to go for a walk in windy conditions -- because the alternative is to stay inside during all of autumn.
I just don't believe that's an especially Dutch thing.
In all fairness, I haven't heard or used the word for a couple of years now, so not sure to what extent this is true: "She says uitwaaien is a popular activity where she lives—one believed to have important psychological benefits. “Uitwaaien is something you do to clear your mind and feel refreshed—out with the bad air, in with the good,” she tells me. “It’s seen as a pleasant, easy, and relaxing experience—a way to destress or escape from daily life.”"