Being a technical writer is not a glamorous or well-paid profession, although it requires the sort of knowledge and attention to detail which can be of use in more glamorous and/or remunerative professions. That is why I am not surprised to see that those who have an ideological interest in lying to children are those who flock to the field, and why I am not surprised to see this sort of blatant lie showing up in our classroom materials.
All I can say is, the right is making it a full-time job just to teach children which lies they’re learning in school. A six year old can tell that most advertisements are lies, but they have to get to about sixteen before they realize they’ve been lied to in school all their lives.