REMOVE Open Area setting on 1.16 Java Edition

At 20w13a snapshot, Minecraft:JE change the rules about fishing. In the past, fishing for treature can anywhere! No metter where the river, on the sea ,or near the puddle. BUT NOW! fishing at the puddle or fishing near the river will NOT got any treature by fishing! It means, if I want to fishing for treatures, I must run to the SEA! What a STUPID setting?! Can remove the Open Area setting about fishing?