I definitely get that vibe from the article. I can see those kind of mothers around me too - outwardly they seem strong and successful (inwardly not satisfied nor happy with their life, if you ever have the chance to know them better), but they very often measure and compare their kids with other. Life is a race with rest of mankind to them and they transfer their mindset to their kids. Needless to say the effect it has on kids is rarely positive long term.

The whole piece basically feels like a humblebrag how great mother she is and how she made all the right choices.

It doesn't contradict what you say per se - kids can have development impediments, and there are dedicated experts to help them. Did she ever reached to those? Nah, she knows the best whats good for her kids. Again, one of those described above.

(The older I get the more I see how people are just few certain 'types' and few subtypes and once they are in certain category, they almost always behave in predictable patterns for given category. Once you are familiar with those, rarely can anybody surprise you with their behavior. This is certainly one of the types I meet)