All the people that have ever existed have lived under the same sun, amirite?

Eh; you'd have to be a trans-universal traveller to know that? Hmm...

So?

But with different degrees

There are way more dead people than alive people.

Well, Im sure you'll enjoy Carl Sagan's remark on the Pale Blue Dot

"Look again at that dot. That's here. That's home. That's us. On it everyone you love, everyone you know, everyone you ever heard of, every human being who ever was, lived out their lives.
The aggregate of our joy and suffering, thousands of confident religions, ideologies, and economic doctrines, every hunter and forager, every hero and coward, every creator and destroyer of civilization, every king and peasant, every young couple in love, every mother and father, hopeful child, inventor and explorer, every teacher of morals, every corrupt politician, every "superstar," every "supreme leader," every saint and sinner in the history of our species lived there--
on a mote of dust suspended in a sunbeam."

No, it‘s just nobody to tell about alive anymore that whitnessed the bulb change