Even if nursery rhymes are helpful for learning the things they're about, it's not like children are being HARMED by not learning nursery rhymes. That makes this letter extra surreal to my mind, because surely the bottom of this slippery slope is the ethical obligation to give one's offspring as much advantage, ie. teaching songs, as physically possible?

But also, unless their child is homeschooled its whole life without access to tv and film, it's pretty much guaranteed to learn those helpful kid songs as soon as it starts daycare, preschool, or kindergarten.