I think you must prove this is necessary. Necessary for what?
I am not defending the atheist position, but whatever one seeks to prove must begin with the facts, that is, with the way things are. Well, the way things are is a real perceiveable material universe, with real material living organsims, some of which are conscious, and some of which (though much fewer) are volitional beings, required to live by conscious choice, which requirement makes knowledge and reason both possible and necessary.
Since conscious rational volitional beings are here in the materially existent world, it is obvious they are possible to such a world. Why is there any necessity to demonstrate the exact method by which they got here. And exactly how do you know they weren't always here?
Hank
The Blind Watchmaker: Why the Evidence of Evolution Reveals a Universe Without Design
by Richard Dawkins
The deist/theist states we are here by design and the atheist states we are here due to mindlessness. There is a burden of proof on both. If you do not believe it is important “to demonstrate the exact method by which they got here” then heck, Hank… why are we discussing this issue? Beyond this, if you believe consciousness beings’ were always here… Are we talking about turtles all the way down?
Heart