This is true for modern marriage but it's not how it was in my grandmother's days or even in my own youth. Children used to live in their parents home until they married. Men were expected to provide a home for their wives but sometimes they moved their wives into their parent's home until they could afford to set up a separate residence. Women married to become the mistresses of their own homes without living under parental rules. Any woman who didn't marry stayed with her parents until they died whereupon she moved in with the brother who inherited. An unmarried woman was a burden because she did not produce an income and could not interfere with the her married sister in law's running of the house. A single woman did need marriage to survive but a man could remain single and work, or squander his inheritance if he wished. I'm glad things have changed but we need to remember what marriage was until very recently.