Because it's not in the article:
https://en.wikipedia.org/wiki/Overview_effect
> The overview effect is a cognitive shift in awareness reported by some astronauts during spaceflight, often while viewing the Earth from outer space
https://en.wikipedia.org/wiki/Overview_effect
> The overview effect is a cognitive shift in awareness reported by some astronauts during spaceflight, often while viewing the Earth from outer space
Anecdote featuring both: https://boingboing.net/2019/04/08/stewart-brand-talks-about-...
(Stewart Brand founded the Long Now Foundation)
Or have they just heard that the Overview Effect is a thing, and are projecting whatever it is they do feel while they're up there, onto it?