The point I was making is more that just because you can use X amount of energy or resources doesnt mean you might want to. Therefore - why expect advanced civ

The point I was making is more that just because you can use X amount of energy or resources doesnt mean you might want to. Therefore - why expect advanced civilisation to be detectable? Just because you could be type 3 doesnt necessarily mean you have to be. Arguably you might _not_ want to - considering 3 body problem game theory and potentially accelerating the heat death of the universe. Or maybe they all just leave. Or maybe they don't exist. So to say its fantasy is essentially assuming we've proved a negative. That's not a hugely rational position to take.