Extreme pronatalists operate like arthroprods (have a hundred babies and maybe a few will make it to breeding age)
Covert misogyny aside, pronatalists have this weird idea where if we flood the world with kids, at least a handful will rise above to be exceptional. It reminds me of how insects will lay thousands of eggs and only 1% of those eggs will make it adulthood, not because the survivors are exceptional but through sheer luck and chance. Humans spend YEARS invested in our offspring's upbringing which eliminates the need to have 10+ kids. We decided it's better to have 2 or 3 and give them the best resources instead of treating our kids like pawns.