Yeah... no. First, the quote said that the most impact a woman can have is as a mother. That's just absurd. Unless you've raised Mark Zuckerberg, there're any number of things a woman can do with her time that will have a greater impact on the world than being a mother. Sure, being a responsible parent (of either gender) is hugely impactful to your child, but it has very little impact on my life. Certainly far less so than the business decisions of, say, Sheryl Sandberg.
Second, there's a long list of jobs that are far more important that being a mother. Even if you just count the things that directly impact children, pediatric surgeons save the lives of thousands of children over the course of their careers, and and teachers teach hundreds of thousands of kids. Both of those jobs seriously impact the lives lots and lots of people, whereas a mother pretty much only influences her own kids.
So no, motherhood is not the most important job ever. It's a perfectly valid life choice; and yes, children need involved parents (again: of BOTH genders) but to suggest that a woman's greatest impact comes from squirting out a baby and taking care of it is just not true.