Could’ve, Would’ve
Hindsight is 20/20. There are a lot of things that happened in the history of our world that seem so avoidable, so changeable with our modern perspective—but actually surviving these events might be a bit more difficult than we think.
This person is so confident they would’ve changed the fate of the Chornobyl disaster, we’re almost tempted to find a way to send them back just to prove us all wrong. That, or contract a whole bunch of health issues.