I am afraid it is not true.
A lot more “Affluent People” (doctors, teachers, professionals like scientists/engineers, etc.) are voting Dems, or at best socially left leaning. (I don’t have the statistics, but remember something in the high 60 to 70%.)
Their children are definitely not lacking opportunities. And maybe they prefer it that way. Gotta keep %^$^&s on the plantations, you know!
I know a lot of conservative and Dem doctors and professionals.
The Dem children are more often than not having troubles with achievement.