This is an outdated view.
The essential costs - housing, healthcare and education - have far outpaced inflation while the cost of food and appliances has not. How can a single income compete in buying from the limited supply of houses against dual incomes?
Community college is affordable. Small 2bd apartment is affordable. Old small car is affordable.
I don't find these statement to be true.
Like $3700 average annual tuition fee isn't affordable?