To be honest, you could probably make that argument for anything under question in any scenario. But even if we were to skip the logical loopholes ("We took it into account, but we decided the benefits outweighed the costs because of <fill in any reason>"), let's just look at the raw numbers or simply just historical facts. Have any disasters at coal plants rendered areas uninhabitable for centuries? OK, take one step back. Would those disasters have occurred if "all disaster scenarios [were] taken into account"?
The reality is that we have no one good and practical energy solution for the world. And even though I believe that there's no practical solution that can beat a tried and tested solution like nuclear in terms of efficiency, I also believe that there's been no tried and tested solution that's been worse in terms of failure.