Agreed and a lot of parents with brains, especially Conservatives do. My daughter home schools her kids and the textbook thing is one of her pet peeves.
My four year old already knows about people “leaning on their own understanding” instead of on God’s Word and asks me about it when we read things in certain books.
We homeschooled K-12, but we never used textbooks. There are so many great history books, booklets, bios, primary sources out there. The worst propaganda can be used, in a homeschool setting, as a learning tool.
My goal in hs was to teach our kid to think for himself. That is what you really want.