where I gotta disagree with you on their framing.

For starters, it's talking evolution. A specific biological process about inherited genes.

"How did this happen? Evolution does not make moral judgments. Evolution does not necessarily reward that which is good or beautiful. It simply rewards those who reproduce the most."

Next point is, it's showing IQ scores. Fans of IQ scores, generally also believe in the studies that imply they are innate, heritable traits.

Sorry but am I completely missing something, is there one part in this intro that even once implies intelligence as, cultural, education, or really says anything other than "smart people have smart kids, if they have them", "dumb people have dumb kids".

Again I hold to the gist, it's a comedy, not meant to be perfectly clear scientific thesis, but the speach from the narrator, is almost always that. even with the ending of "they gave birth to three children, the 3 smartest kids in the world". "his vice president Frido took 8 wives and had 32 kids, the dumbest kids to ever walk the earth".