I have close friends who thought as you do. They're now 85 years old with their daughter, son in law and two grandchildren living with them. Not because of a bad economy (they moved in during the boom years) but because their daughter refuses to live a lifestyle any lower than what she had become accustomed to before she was married.
It's been four years now, with no sign that they'll ever decide to be out on their own. They don't love them any less, they just want them out.
The most destructive thing you can do for the people you love is that which they can and should do for themselves.
So very true. In fact in the book "The Millionaire Next Door" by two authors whose names I can't remember it was proved that the worst thing wealthy parents can do for their children is to lavish unconditional money on them. The wealthy parents who made their children work for their money had the most self-sufficient kids.
The opposite was true for the parents who doted on their kids, gave them gobs of money from an early age, set up their businesses, and made sure they didn't fail. The children of the latter never learned how to be self-sufficient. Many ended hoping for their wealthy parents to die early to get their money to squander as fast as they could spend it.