My point is, though, that CE (where questioning is not part of the mix!) for children of a young age is even less appropriate than for older kids
Your six year old might be confused today but they are six. As they grow old they will learn to understand that not everybody agrees all the time and this isn't the end of the world. A pretty good lession is you ask me.
I see your point and I think I agree with it.
My thing is that if questioning isn't part of the mix then it isn't education, it's indoctrination. Therefore, how old they are isn't really a major issue.
To articulate what I think your point is another way:
An older child will have a greater facility to withstand indoctrination than a younger child because the older child will have a greater store of experiences to draw from to come to their own conclusions. Therefore, younger children should not be exposed to indoctrination but for older ones it might not be so bad.
If you put it that way ...