Given the generally accepted idea that our consciousness is the product of our brain. And for some reason or another we emerged in our respective bodies, (im not invoking a spirit argument or anything, just saying we were the by product of our brain, within this body) Why couldn't we re-emerge elsewhere after death? (obviously with no past life bullshit, im not trying to invoke any spiritual fuckery here)

This is all speculative obviously because who the fuck knows, but are their any major issues with my assumption?

I guess to add to my post, which is maybe tangentially related, mathematically why did I emerge in this specific body, and not another?