Earlier quoted context omitted.
I think that part of the problem is a want versus a need. I don't particularly care if me and my wife don't sit together. We see each other all the time. But I don't want to have my four-year-old sitting in between two strangers, six rows in front of me where I can't see him. That's not fair to the two strangers, but also I don't trust strangers. I get the idea of paying for the privilege, but at the same time, it's…
This exactly. For parents it is not a choice, you absolutely must have a parent sitting by a young child. The effect of not automatically putting parent and children next to each other would just be making tickets more expensive for parents.
You know this is going to happen too: there are going to be some subset of parents that are not going to pay extra and will just choose to let the airline make their kids some complete stranger's problem. Hope the general public enjoys it.