The people aren't particularily smart there it seems. They get overexcited by finding a way to reach a goal that they complete blow past any possible side effects.
Joss may restore peace to the system, but that doesn't mean you'll have the same ecosystem. For instance the wadden sea example with the seagrass: It used to be quite sandy and the water was very clear and not flowing very fast, all due to the seagrass. Then people started harvesting the seagrass and it was struck by a disease, removing pretty much all the grass from the sea floor. Now the floor is very muddy and very fine, easy to sink in. The water is fairly murky and currents run faster. If we'd return all those somehow to their inital values, we still won't get seagrass back. It's called an alternative stable state. Easy to get into, hard or impossible to get back. For instance the water turbidity was at 20% (just an example). Then it rose to 50% and the seagrass all went away and now it's at 80%. If we reduce it to 40%, we still don't get the seagrass back, for that we may have to reduce it to as far as 10%. Alternative stable state...fear it
And there's a lesson in (marine) ecology for ya
