It is just our human bias to envision complexity as only occurring on earth-like planets, on human-like time and size scales, communicating over the EM spectrum, formed of baryonic matter...
The argument works just as well if you stipulate that it covers only sufficiently human-like complex life. The speculated existence of life composed of galaxy-scale non-baryonic matter or something doesn't affect at all the question of where all the other more prosaic life is.