The problem is, all such judgements about artistic value are ultimately subjective (when you start claiming that some have objectively better technique, you just get into the idea that empty technique has intrinsic artistic value etc). So it can never be usefully used to settle these arguments - and somehow, the people who want to ban it are always among the ones who seem to find it of minimal artistic value. The photo was by a noted photographer, who in her artistic judgement thought it was worth photographing, lots of people value her work, the only real answer to 'well, I don't think its a good photo' is 'well, don't go and look at it then'.

And as far as the kids opinions - you do realise that by that same reasoning, we can't assume kids will be ok about ANY photo taken of them? We have to trust their legal guardians to make decisions in their best interest, or ban the public display of children entirely.