That statement has so many things wrong with it. Woman shouldn't always have to marry and have children.
Woman should always marry and have children (Puritan Code)
Sometimes its impossible for one to have children.
And why is that?
Illnesses like PCOS cause female infertility. Making so they cant have children which makes your statement about all woman should wrong/impossible because some woman are incapable to do so. (https://www.womenshealth.gov/a-z-topics/infertility)