its easy: - Udssr did something wrong its very useful to this day for the us. - Fukushima was done by an "western orientated" country. - The fact that people say that chernobyl was worse then Fukushima is them not thinking. Fukushima was build in a area were this kind of accidents happen all the time. - If Fukushima happened in China you would have more netflix tv shows about it how bad it was handled. - Remember western media is going through an American lens. Just watch any main stream holy wood movie about war and think of it as US propaganda and you will see it everywhere
The USSR made several key decisions which made Chernobyl a far more dangerous and deadly situation and it's important that the decision making process is studied and understood to stop it from being repeated. As far as I'm aware Fukushima was a series of unlikely events when brought together ended in a disaster. The decision making process was fairly open to the public and open to international scrutiny and criticism.