Why were most pharaohs buried in the Valley of King Muruk on the west bank of the Nile during the new kingdom of ancient Egypt?

The capital of the new kingdom of ancient Egypt is in Thebes on the east bank of the Nile, but most of the pharaohs of the new kingdom are buried in the Valley of King Muruk on the west bank of the Nile. Thousands of years ago, Egyptians regarded sunrise as a symbol of life and sunset as a symbol of death. Therefore, they built the temple on the east bank of the Nile, which symbolizes sunrise, and later called it "the city of the living", while the tomb was built on the west bank of the Nile, which symbolizes sunset, and later called it "the city of the dead". The Valley of the Kings faces Luxor Temple and Karnak Temple across the river. Near the most spectacular cemetery in the world, those huge colonnades and temples still reveal the majestic atmosphere of the past.