Greed and sloppiness? Everyone will grant you that in the case of the Soviet nuclear energy program and the result with Chernobyl, but beyond that, there's nothing to support your argument. If anything, the fact that the only significant accident was the result of human error magnified by institutional decision-making is a remarkably positive argument. Modern reactor designs and procedures are radically different than they were back in the 60s. Ignoring the progress of technology and the safety benefits that it results in is an incredibly narrow-minded position. We learn from history in every other field; what supports your conclusion that nuclear power is somehow different?

Very substantial amounts of nuclear waste already exist.

Stopping making more doesn't make the problem go away (...at least for many thousand years). I'm more optimistic that current waste will be reprocessed or stored safely if nuclear power generation continues than if it all gets quietly forgotten.