Couldn't it just reflect the base rates? I wonder if the explanation could be found from making a comparison of the statistics from when the respective presiden

Couldn't it just reflect the base rates? I wonder if the explanation could be found from making a comparison of the statistics from when the respective presidents entered university on how many people in upwardly mobile families studied to become engineers / lawyers in China vs Western countries. I suspect in China 20 to 30 years ago engineering was seen as the route to success because of booming manufacturing industry whereas in the US service industry has been taking over for decades. I don't know the statistics for China 20 or 30 years ago but I hire from top graduate schools in India today which is like China around year 2000 in many respects. Most of the students I see studied engineering at undergraduate level.