Are You a Halfer?

There's no information given as to the probability of which consciousness you're going to inhabit. So that drives me much stronger towards the halfer point of view. We have been born, so does that mean we are way more likely to be on a high population world or, or the only world? If there is no extra life in the universe, why are we not? What is this species that is way more common than the human being? Ants. Why are we not ants? Well, you know what I mean? Like, did we just win some astronomically impossible lottery and become humans?