I would expect that if there was a valid debate to be had she would also have peer reviewed papers published on the topic.

Skimming https://www.brown.edu/research/projects/oster/ I haven't found any related

It seems like her general cause is a good one: to ease parents to relax a bit on what some perceive as apparently harsh recommendations on health and parenting.

But it also seems like she misses the point on what public health bodies are for (minimizing risk on large scale) versus clear advice to individuals. Take alcohol for example, if the actual evidence is flimsy on whether 1 drink is bad or not, it's an easy choice if I'm speaking to millions of people: play it safe. That's not the same as claiming that low alcohol consumption is bad, and it's certainly not an attempt to shame.