A lot of things COULD happen. For example, a meteor could hit the earth and wipe out all life. Therefore we should pour ALL resources into space exploration, not medicine.
Yes, please do! I think there is an inflated perception of risk because of the relentless media coverage. Risks are probably still higher than the meteor example, but the point of the example is to call for actual numbers! It's not enough to say "some bad thing COULD happen". Many bad things COULD happen.