The greatest issue about affordability for young people is that they believe it is their right to have work/life balance right out of high school, and to have the same life they had when living with their parents. Very few understand what hardship is until its too late. Do you know who can afford their own houses these days in their early thirties? Individuals who work six and seven days a week and multiple jobs and save that money up. Not those who live at home, work 35-40 hours a week and then spend all their money on vacations, weekends away, Starbucks, and wine nights.
Oh, and the other group that can afford housing. Immigrant families where all eight family members work whatever jobs they can get for as many hours as possible, and pool their earnings. And when they have enough saved up, they buy a local business and run it successfully. And then purchase the next one, and so on, creating employment for the ever growing family.
This used to be the way family farms, and family run businesses worked, until the newest generations decided they didn't want to put in the effort to keep the wealth generating businesses going because the work was too hard.