I completely agree, filling oceans/seas with noise seems like a good recipe to further stress marine ecosystems
I suppose the good news is that jellyfish that will step in to fill the niche don't care about sound.
Maybe state funding for privateering navies given license to sink illegal fishing boats would be a good start. Trawling and other wildly destructive practices funded by various south asian countries are doing incalculable harm all over the world. Sink on sight is an appropriate policy.
Humanity has to get their shit together, or jellyfish will be all that's left.