No, it's a good point (if a little ... mercenary).
Illegal aliens don't pay many taxes, rent expensive apartments, buy expensive food, or buy expensive food; because most of them are poor. High skilled immigrants pay lots of taxes, and blow lots of money on expensive things (like hiring maids, dining out, etc). Murica would rather have badly educated kids who are there to serve highly paid immigrants than well educated kids who make money which they can use to pay low-skilled immigrants.
You *could* educated American kids better, but that's a states issue (not a federal one like immigration). OK, the federal government has tried to fix education (with No Child Left Behind), but ... maybe it would be better if they found something else to wreck.