I can’t speak for the person who wrote that. But my interpretation was that parents should strongly encourage their adult children to grow up and take adult responsibility for their lives. And part of that would be settling down. Hopefully that person will come back and explain what they meant.
“But my interpretation was that parents should strongly encourage their adult children to grow up and take adult responsibility for their lives.”
Adolescence, it appears, has been allowed to be extended to about 40 years old. Maturity wise, anyway.