Unfortunately for most people, income is not evenly distributed. Nearly half of US households make <$75k, and less than a quarter make >$150k.
On top of that, divorce rates are higher at lower income levels.
It is true that improvements to the social safety net and general services like education and transportation will not benefit every child of divorced parents equally, but the proportion households that would benefit from safety net and general service improvements if their income was split in two is significant. And those benefits would be most dramatic and most concentrated where most needed.
He is just deepening the trade deficit by preventing the export of education and as well as all the goods and services that support students