> because the theoretical amount of ETs You're referring to a theoretical model which is not backed up by any empirical proof other than the fact that there is

> because the theoretical amount of ETs You're referring to a theoretical model which is not backed up by any empirical proof other than the fact that there is life on Earth. Thus the model is yet to be validated, thus as far as we know it outputs nonsense. Until then we only have empirical proof, and so far the count of proven alien contact is zero.