What are schools and pools of fish? And floating debris/wreckage?
A. Let me tell you a story. Back in the day, fishing was considered too profitable; fish could be sold to vendors for a great amount of money, for very little effort… a perfect profession for gold-sellers, as it were. Fearing inflation and fishing bots, Blizzard nerfed the price of fish; BAM! 1-2 copper a fish. Fishing fell off the radar for all but a few die-hard fans. Included in this nerf was the significantly higher drop rate of items.