This spill occurred 40 years ago. Humans are capable of improvement over time. Look at airline safety, for example.
So they decided it was good enough for "now" until this was discovered. I would say the Company that caused the spill will get away without paying cleanup costs. That is what usually happens with these type of Environmental Damage in the US.
Like the Boeing 737 Max?
We can’t make an uninhabitable environment habitable.
It might be the only option though.
People like to latch onto things thinking they are an obvious perfect solution without honestly recognising the costs.
Not very comforting.
Just one bad accident can destroy so much more than aircraft