I thought this was a long established knowledge in neuroscience, basically "diffused thinking". Is this specifically about walking, as a preferred method to get the best out of diffused thinking mode?
Inc is one step above 'obvious AI generated drivel' for me. It's literally just regurgitated popscience and 20 links to either other Inc articles or to 3rd party popscience sites.
I tend to default to DT for any open-ended/creative problem. Write it down in Apple Notes, let it simmer on the back burner for a while and add ideas as they come.