>After Chernobyl we were promised nothing like this would ever happened again because that reactor was so bad, and bla bla bla. Oops then Fukushima happened.

This is remarkably sloppy logic. Chernobyl was a questionable design. Fukushima was a different design that's more common, but still old.

The two accidents had little in common. Did you really think when someone said that Chernobyl wouldn't happen again that they meant all reactor types everywhere would never have another accident of any kind? If so, you're pretty naive.

>There will always be something you did not think about.

True about every technology ever created, and not a good enough reason to avoid progress and invention altogether.