Final answer:
The Greeks may have chosen not to depict Hades extensively in their art or dedicate temples to him due to associations with the underworld and death, which could invoke fear and taboo. Greek art and temples that do exist showcase important cultural values and mythological stories that were integral to their society's identity and understanding of the world.
Step-by-step explanation:
The Greeks often did not depict Hades in art or have dedicated temples to him largely because he was the god of the underworld, a realm that was associated with death and the afterlife—a concept which may have elicited fear and taboo. Consequently, rituals and animal sacrifices in honor of the other gods or goddesses were a public affair and took place outside the majestic temples. Temples and their art serve as an insightful scope into Greek culture, mythology, and the values that were important to the ancient civilization such as heroism, as depicted by the likes of Herakles and Perseus. By examining depictions that do exist, like on pottery or in architectural decoration, it is noted that the Greek art was often a reflection of their social values, religious practices, and their understanding of life surrounding them, rather than illustrations of all deities equally.