The breakdown used in the piece:
Kids are eligible for public pre-K etc relatively young so basically the article is saying that parents will experience lean years - which is absolutely true. That 30K makes all the difference. Some of the other expenses, for instance transportation. Assuming that includes car notes that goes away after a few years as well.
I agree with the idea that 6 figures doesn’t mean what many people assume. And my sense is that the author is using a figure like 140 to not only sympathize with those experiencing that new reality but also for engagement etc.
I think the overarching argument - that these kinds of figures and categories need to be revisited - is sound.