In the case of no filter however, we can expect that any intelligence would start expanding into the universe at near the speed of light.
Questionable premise. It isn’t at all clear how close one can get to the speed of light, and even if this were occurring at 10% of the speed of light rather 99% the situation would look drastically different.
Questionable premise. It isn’t at all clear how close one can get to the speed of light, and even if this were occurring at 10% of the speed of light rather 99% the situation would look drastically different.