Cephus
Relentlessly Rational
I'm just trying to keep open-minded to all possibilities that I haven't ruled out yet. Yes I believe natural processes leading to speciation perfectly fine, but I haven't ruled out E.T.. I'm not going to attribute divine qualities to my alien concept. I used to believe and sometimes dabble with the idea that extra-terrestrials made life easier because they could have evolved once and created life on other planets for awhile, making the odds of finding life per planet greater. As far as the idea that they've been here forever well, perhaps if the Universe is infinite (see next paragraph) everything occurs in ratio to its symmetry and simplicity. At least that's what I used to think. Being a being of many equivalent cells is one symmetry and simplicity, as well as 4-5 DNAs and 20 proteins, as well as our body shape.
The big bang is certainly true. The microwave background, galaxy spread, and Type IA Supernovae all date the Universe back to the same date with good precision, but I wonder if there were more big bangs. I even wonder if they intersect to create galaxies. If they can visit us, it is not up to us whether they interfere.
I believe I answered all your questions. Sorry for the sloppiness.
There's a difference between not ruling things out and embracing them irrationally. We haven't ruled out invisible pixies either, do you want to incorporate them into your worldview too?