It's not watering it down when the result is the same. My parents took me to church, sent me to Catholic school and generally taught me Catholicism as fact. It wasn't as harsh as your example, to be sure, but the result was the same: me being Catholic and believing in everything religious they did.
That's seriously your criteria for determining whether something is "brainwashing"? Brainwashed: Believing that something is true that your parents have told you.
In that case, I was "brainwashed" when my parents told me that vegetables were good for me.
I was "brainwashed" when my teacher taught me that George Washington was the first President.
This would make every single child brainwashed. After all, all of them believes something that their parents taught them.
I assume that you acknowledge a difference between "brainwashing" and teaching/informing/educating. What do you think that is?
The end result of both could very well be the same: Children believing that something is true because they were told it was true by an authority figure.
Thus, the end result isn't the distinguishing factor. The distinguishing factor is the methodology, how you get to the end point.
Homicide and accidental death both have the same result-- a dead person. So why do we have different words or ways of thinking about them? Because how they get there is a relevant difference.
It seems to me that you are calling homicide on an accidental death.