So did tons and tons of oil spills poisoning fishing grounds and coral attractions , gas leaks, rise in sea level causing many people to migrate, blasts of fuel containers, respiratory diseases from air pollution, crop destruction from acid rain, etc, etc.

I'd wager their impact will be less than that of climage change if we look a few hundred years into the future.

Regardless, both those disasters were more or less man-made. Chernobyl was caused by serious design flaws, and (as far as I know) people who refused to admit something was wrong until it was too late. Fukushima was built below the line indicated by stones setup to warn about tsunamis. I don't think there's any doubt such considerations need to be taken into account when building the next-generation nuclear reactors.

And still disrupted (dead) lives per energy generated nuclear is one of the safest options. There was hydroelectric fail with 160000 lives lost, and it is not even mentioned when discussing dangers of energy generation.

[0]. https://en.m.wikipedia.org/wiki/1975_Banqiao_Dam_failure