I get what you mean OP, and others with similar issues to me.
I live rurally. Near the M5 but in a highly socio economically deprived area. Our local housing plan has just been published and it makes no sense at all!
Number of households = X
Number of houses available = X + Y
Number of houses urgently required acording to the government = Z
And then they look at the geography. 5 market towns and about 4 large villages. All bar 1 has a natural boundary that cannot be encroached upon. The 5th, where I live, has been designated as the area to make up the shortfall.
Yes, the shortfall that we do not have.. .and 20 year growth predictions from local university is Y and about 10% of Z
What we do have is a land grab. Our small market town has had the surounding greenfields designated building plots, thousands (literally) of houses have been given the go ahead.
But the local infrastructure is not going to be improved, mainly because it physically cannot be. So currently we are almost locked in by floods and road closures for water works to feed the additional houses. Yes, again, literally. It has taken me 2 hours to drive 7 miles on 4 of the last 6 days and I have no other route out to work!
A couple of years ago they 'improved' some local roundabouts to ease congestion. But did not widen the single carriage connecting road that causes the bottleneck of traffic. Now they are adding thousands of cares to that road network with no addtional improvements being planned.
Why?
We have enough houses for the current local population and almost enough for the 20 year projected growth. So who are these additional, usually large, 4+ bedroom 'executive' homes being built for? Locals can't even afford to live in, buy or rent, the 'affordable homes' that each development has to have by law - I know this as I work with letting agents and have met many of the new tenants!
We are building houses for people who are relocating from the South East, as far as I can tell! Many of the complexes are for over 55s, so we are also supplying a bucolic lifestyle for the well heeled older population
So farming land is being stripped, local people are finding it hard to live here, work is disappearing with the land and our quaint market town is dying a slow death. The new builds we already have form a cordon around town... most people shop as they come home from work, have Tesco deliveries, and very rarely set foot in town! So only those of us who live inside the bypass shop here and everyone else shops in the nearest larger towns and cities.
And nobody can put together a coherent answer to the questions Why? and how the hell will we all travel, get to work, find school, GP places?
So no, supply and demand does not explain the 'housing crisis'. Shifting populations, mobile populations, ageing populations do. And that leaves local populations in cheaper areas at distinct disadvantage.
And yes, I am locally politically active on this matter.