For this commenter, motherhood is a low-level managerial job. The mother's responsibility is to monitor her kids' performance and ensure that it's up to snuff. If their assessments are high, she's managed them well.
I see a lot of this where I live. The corporate paradigm is the filter through which we see the rest of life. School is a job for kids, which prepares them for adult jobs by forcing them to be show up on time, put in their hours (plus extensive overtime!), and get their paperwork filled out correctly and submitted to the appropriate supervisor. The kid who performs well at school is rewarded with a credential which will eventually result in a well-paid adult job.
In my high-achieving professional-class district, we have "good schools", which means that a lot of our kids go on to competitive colleges and high-salary jobs. Are the kids knowledgeable in real subjects, like math and history? Can they write clearly and intelligently? Are they happy? Do they have friends? Do they have a sense of purpose and meaning in their lives? Who the hell cares? All we need to know is the name of the highest-ranked college they got into and we know where they stand.