You just might be onto something there ... but if there have been more than our intelligence, arise on another planet, somewhere, then there probably have been so many such events that eventually one planet’s smarties would have anticipated the dangers and avoided them ... so why are we still not in touch with them? And why wouldn’t they go around the unioverse trying to prevent such planetary suicides?
Unfortunately, the planet's dummies eventually went ahead and tried the same experiment anyway.
why wouldn’t they go around the unioverse trying to prevent such planetary suicides?
Any species dumb enough to try a planet-evaporating experiment gets what it deserves, eh?