>>12638521>>12639581These are both fair arguments but the difference is that we don't really know the probability of abiogenesis with certainty and low probability is an asumption. Meanwhile stars being visible is a fact and all the other assumptions are derived from fundamental physics like thermodynamics.
>>12638638Not necessarily Dyson Sphere, just extinguishing stars in some way, Dyson Sphere is too precise as there are potentially a lot of ways to do similar things.
>>12639345The problem isn't that gold or copper isn't rare. It's more about the fact that the amount of energy needed to come to Earth and then mine the material to transport it back to whereever you want it uses more energy than just turning some other element into the element you want. So the Alien could just turn for example Lead into Gold or Nickel into Copper using high energy transmutation. This would be far more efficient in terms of energy use and far quicker.
Advanced species won't look at elements or resources besides generic "matterenergy"
