This is linked to (imho) one of the greatest philosophical experiments humans can do:

1. simulate a world with very basic "physical" rules (so it is free from human bias)

2. let the simulation run until organisms exist

3. let it run longer so the organisms develop language

4. now see if the organisms talk about things like "consciousness" and "why are we here"

The nice thing is that we don't have to do the experiment to think about what it means if 4 happens or not.

Indeed, philosophy has been around for millennia, probably longer than the written word.

I'd be prepared to accept 7 billion don't.

I have met some people in my lifetime, never heard any questioning that, (even being high LOL). I don´t see anyone in social media asking that neither. Maybe we live in parallel worlds.