Yeah, but none of that really matters. The girl doesn't know that, all she knows is that the program thinks she's fat. It's a computer, it wouldn't be saying that just to be mean. So, she takes it on board. Assign the blame wherever it's due, I'm just pointing out the effect.
I think we all understand the effects, and that they may have been harmful in this case, but that's not the issue (it certainly is an issue, but you can't undo that).
The issue is that the parents are making a big deal and casting blame from a matter that shouldn't have been a big deal in the first place.
Again, consider my analogy: If the sight of spiders emotionally distresses a child, it doesn't help to blame the spider for being ugly, regardless of how severe the effects were on the child.