Answer: imply that young women do not have a choice in their own marriages.
The Importance of Being Earnest is written in a way that pokes fun at Victorian institutions. The play, therefore, provides a social commentary on society at the time. In this case, Lady Bracknell's character is used as a way to ridicule the idea of marriage. While she considers a good marriage to be extremely desirable, her words imply that women do not have a choice in their marriages.