"out of the house". Not these days.
Our son joined the army when he was still 18 years old. He had graduated high school at 17 with honors, traveled through Europe for the summer, came home and started college. After one term, he decided he wanted to see the world. He's never lived at home since aside for visits when on vacation. Our daughter married at 20 years of age. Her husband is in the army. They have moved around a lot because of this. During all three of his deployments to the Middle East, she and our grandson have lived with us.
The bottom line is that there are many reasons why young people live with their parents. Sometimes some people paint it like they are just losers who cannot make it on their own. That is not always the case. Incidentally, when our daughter has lived with us, she's always insisted on paying us rent. Fortunately, we have a rather large home with plenty of room for family to share when the need arises.
College expenses can be prohibitive. I really makes sense for a lot of college aged people to continue living at home when possible. Just meeting tuition can be a real burden. On the other hand, my nephew moved in with us awhile back. He didn't work much and therefore could not afford to contribute on his behalf for household expenses. When it became apparent that he was not doing all he could to get his act together, I asked him to move out. He moved in with his girlfriend who had a steady job. Some folks really benefit from having to make it on their own. He and his girlfriend are still together, he is somewhat employed and they are raising their daughter. My nephew is 25 years old. My hope is that he will get his GED and learn a trade at Community college. But this will be up to him.