"Everything would have been fine if it weren't for the politicians" is not a path forward. These sorts of disasters will continue to happen.
Isn't it always true, for such matters?
As we cannot avoid committing errors it seems better to prefer a way without any risk of major accident (very dangerous radioactive things, difficult to cleanup, travelling long-distance thanks to wind, rain...). No wonder renewable sources quickly gain traction.
That isn't how this works.
We have a replacement for nuclear: renewables.
Renewables can be a complement to other power sources, but to even suggest they can be a "replacement" for nuclear power indicates either naivety or ignorance.
As I said: "The big problem with nuclear is not technological, it’s guaranteeing that whoever is responsible for it will be competent, capable and solvent for hundreds of years."
Humans working in the nuclear industry are "the" nuclear industry. By definition all economical sectors are arranged around human workers. Remove each human and the industry will lose its reason to exist.
I mean. If the story is true (which I have my doubts about). Then the simple change required would have been to make it clear that TEPCO has the sole authority to decide to scuttle the reactors. The politicians could have been morons going on a power trip all they wanted, and the reactors would have been safely scuttled.
If you are a firefighter you wouldn't ask the government if you should pump gasoline or water on a fire. Why did the people managing the nuclear reactors gave the government an opportunity to choose wrong? (Or rather, why was the system set up such that it was not already clearly defined under which technical circumstances the reactor must be be scuttled.)
For the simple reason that the 3/11 Tohoku Earthquake defied and rewrote essentially all the geological/maritime scientific and political expectations up to that point.
I doubt the same errors will happen today, but hindsight is 20/20.
The nuclear (TEPCO) people in the field were and are amazing, and it is a cardinal sin they got scapegoated for political purposes.