Actually, to a shocking degree, yes.
I grew up in an immigrant family, so my parents were far too busy working to do non-mainstream research on diet. I grew up eating 2+ bowls of white rice, another serving of vegetables, and a small serving of meat for most meals. This was me "trying to be healthy" given the mainstream knowledge at the time.
If your parents aren't well-off enough to do dedicated research into the optimal diet for their children (which describes most of American parents), then you'll follow the advertised government guidelines.