> You don't need a house. Many of the kids I knew growing up lived in apartments.
Apartments are part of the housing market
> If they lived in a house they could inherit it from their parents.
Teenagers probably want to move out of their parents home (be it a house or apartment).
> Why is the housing market something children worry about?
See above : teenagers often want and look forward to independence, and housing is 100% central to that goal. Their future horizon may be a little shallower than that of the average adult, but they do have a horizon - i.e short term goals that they want to achieve.
At least for me, that meant figuring out how I was going to actually live on my own come 18. You can bet I was worried about housing prices (even if my immediate goal was to rent).
> If they lived in a house they could inherit it from their parents.
Heh "hi mom, dad, FYI I'm planning to live with you and my two siblings until I'm around 50 and then you can die and it'll just be us three kids here".
If they lived in a house they could inherit it from their parents. Why is the housing market something children worry about?