You missed the second paragraph of the post you're quoting, where I said "Maybe not marriage at 16, but I think girls should look at being married by 22".
The average age at which girls these days become sexually active, is around 17. They will go though a number of sexual partners before perhaps settling down in their late 20's.
I'm saying that perhaps it would be better if they got married earlier than late 20's, like early 20's.
There is nothing like our first love. Perhaps a long engagement while they get their ducks in a row is a great idea.