This has already been answered. Not repeating myself
Yes, Americans have private schools. And the families that drive on the public roads to get to their private schools every day use government assistance through paved roads. You don't think they walk to school every day do you?
And the families that vaccinate their children in order to attend the private schools are using government assistance through the CDC and FDA which regulate and distribute vaccines and medical personnel.
And the families that dress their children in uniforms to attend private school are relying on government assistance that regulates business and trade, which includes clothing manufacturers.
Not to mention, the buildings that private schools exist in. They were built using government assistance. Somebody in the government had to zone the land, issue a building permit, and inspect the building when done. All of the building materials bought by the private school to build the building were regulated by government agencies that regulate business, trade and commerce.
Like I said....EVERY child uses government assistance in some way or another.
And you were saying?