To explore the point, there is none. Finding a mechanism to explain what the hell we are doing here is in itself a cognition bias. The vast majority of science, literature, the arts, fuck- even our relationships, is to validate that there isn't a void, but that void is always present.

Optimistically, we seem to be the right combination of atoms and neurons to be capable of some pretty outlandish, seemingly pointless endeavors. There is no reason for jumpin' dirtbikes, blowin' shit up for fun, fuckin' when there's no possibility for babies, drinkin' hard liquor, and rally cars. My cultural nexus aside, entertainment in itself is a validator.

"Caring" "Living" and "Finding meaning" as far as I can see without become a nihilist, are secondary to hard work and the absurd.