Depends how it's presented. What makes doctrine doctrine is that it's presented as unquestionably true on the basis of the authority of the source.If I tell my son or daughter not to beat up other kids, is that not "indoctrination"?
So...
- "Don't hit people because I said so" - maybe "doctrine".
-"Think about how you feel when someone hits you - you don't like that, do you?" - not "doctrine".
In any case, you're making an unfair comparison. It seems like the sort of "doctrine" you're describing (to the extent that it's doctrine at all) is also the sort of "doctrine" that religious parents also teach their kids. The religious parents just often layer lots of doctrine - actual doctrine - on top. It also seems like you're trying to draw a false equivalency between things where it's demonstrably vital that a child knows them (e.g. "don't touch a hot stove"-type instruction) with stuff that isn't demonstrably necessary at all. It's like equating braces with tattoos on the grounds that they're both "body modification".