>>55220913We don't even really know if the cards are supposed to depict paradox mons in the future, or paradox mons who have arrived in the present. Either way my assumption would be that they don't want to establish too many details about a hypothetical future in universe. A natural environment reveals less about the unique traits of the setting and a lush forest/jungle would feel more like past than future. We tend to think of the future aesthetic as sterile and minimalistic with bright colorful lights, and a desert or wasteland with emphasis on stars tends to fit into that atmosphere.
Also not all of them feature wastelands.