Because we are talking about what is possible in the not far off future. And we are not talking about what is, now.
Humanity developed a neo-cortex that allows us to develop a view of what is possible and to compare a range of future possibilities and make decisions based on examining those. Talking about what is - only - is rather primitive, compared to talking about what is possible. I think there has been plenty of information put forward to describe what is possible, and why. If you want to grasp that.
