I agree with you, but I'll continue to maintain that academics is not what gets Christian parents upset. It is the promotion of the anti-God agenda that first gets their attention.
"It is the promotion of the anti-God agenda that first gets their attention."
Absolutely. People don't normally make important and expensive decisions based on just one factor. The anti-God agenda certainly gets Christian parents attention. But once they look into home education, I think it's the academics that works to seal the deal.
Going against the tide takes some level of courage and initiative. Having multiple good reasons for doing so helps.