Supply and demand doesn't come into it when there are people who don't know how to manage their money.
There are guys who I used to go to school with who live in rent. These same guys turned up to school back in the day with a 20 year old car, latest mobile phone, and whatever else was cool back then. They spend spend spend because they don't know any better.
Fast forward, and all the sacrifices I made back then see me own 2 houses, a granny flat and an apartment. 3 of them are leased. Plus we have plans to level one and rebuild.
That does not come down to supply and demand. It comes down to being educated and looking at the bigger picture.