It’s thankfully based on pretty bad game theory. The reality of it is that there end up being more negative consequences to attacking other civilizations than either staying isolated or being friendly, and the proposition is riddled with antropocentric concepts to begin with. Sure, in smaller time scales it might be that alien civilizations would attack each other, but over longer times they would tend to form alliances.
Even your conclusion is anthropocentric.
There’s just too many guesses to dark forest.
Nah the dark forest doesn’t really work, If turning on a light (so to speak) makes you a target then a muzzle flash is even worse. It takes a lot of energy to kill a planet however you do it and thats going to tell everyone where the shooter is.
And no you can’t use an asteroid because all the matter in the universe couldn’t make a computer powerful enough to make it hit over a reasonable distance and getting to our solar system to use one of the ones here is just as energetic as firing a projectile.