The issue is economic incentives do not align. The fisher can bring it back to shore and probably have to pay to dispose of it in a landfill. Or they can drop it in the ocean for free, while creating a negative externality.
If someone setup a fund to pay fisherman 5 cents a pound to bring their nets back, and then they would deal with disposal, they could avert most of this. No one has stepped up with $50 million a year tho to solve this.
