You're right, as much as I'd like not to be aware of it. Indeed, the bar is very low.
Whether heeding ChatGPT advice would be better or worse than no advice at all, I honestly cannot say. On the one hand, getting some advice would probably help in many, many cases - there's a lot of low-hanging fruit here; on the other, low-quality advice has the potential to ruin the lives of multiple people at any moment. This is like medical or lawyer advice: very high stakes in many cases. Should we rely on a model that doesn't really understand the underlying logic for advice on such matters? The "average" of parenting blogs can be a mish-mash of different philosophies or approaches glued together, making up something that sounds plausible but leads to catastrophic results years or decades later.
I don't know. Parenting is a complex problem in itself; then you have people generally not looking for advice or being unable to recognize good advice. It doesn't look like adding a hallucinating AI model to the mix would help much, but I may be wrong on this. I guess we'll find out the hard way: through people trying (or not) it out and then living with consequences (if any).