If nuclear power plants slowly created an exclusion zone around them that grows over time, then you would have a point since each individual plant would have a tiny exclusion zone, but the problem is that the accidents are the result of gross negligence in the cases of both Chernobyl and Fukushima. Arguing about modern safety standards is meaningless by the way. Back when the Fukushima accident happened, the Fukushima power plant was older than the one in Chernobyl. This tells us two things. People build unsafe nuclear power plant designs, even when safer ones are available and second, when regulations get stricter, the bad power plants stick around for decades until they fail. If you wanted to put nuclear power plants into the best spotlight possible, you would demand old power plants be replaced by new designs, since that massively reduces the risk of another accident that makes nuclear power look bad. However, what we hear all the time is that the nuclear power plant industry wants less safety regulations so that they can cheaply repeat mistakes of the past.