If you're consistently in your right mind you can safely create the means of your own extinction, with the knowledge that you are sufficiently sane not to use it to extinguish yourself. This can come in handy when the means of your own extinction has significant non-extinction related uses.
This is true in theory, but do you think it's an accurate description of our real world?
(Nuclear power is potentially great, but with a bit more patience and care, we could stretch our non-nuclear resources quite a bit further, which would have given us more time to build stable(r) political systems.)
Here's the new thread for posting quotes, with the usual rules: