Why are scallops so expensive?

Why is it that scallops are priced so exorbitantly? Is it due to their limited availability, making them a rare delicacy? Or is it because of the intricate process involved in harvesting and cultivating them? Could it be the quality of their meat, which is renowned for its rich, sweet flavor and tender texture? I'm genuinely curious to understand the factors that contribute to the high cost of scallops and why they're considered such a luxurious seafood item.