In photos of our Earth taken from space, at first glance you probably won't see signs of intelligent life, except perhaps at night. Same with Possibly Inhabited Planets: you can't see evidence of human endeavor on their surface, but civilizations could be residing there in plain sight, if we knew how to see them. (Try looking at Josh's recent planets in the dark?)
These Possibly Inhabited Planets were made in late 2020... as if Josh maybe sensed just how much we would need their spark of possibility in 2021.