JenPlateau said:The distinction that resolves most of these threads is between what is true on average and what is true for one person.
Coming at JenPlateau’s question from a different direction. It is worth asking what the claim would look like if it were false. If nothing would look different, it is not a claim about the world and no amount of discussion will settle it.
If somebody has the primary source to hand I would rather cite it than paraphrase it.