Owning your own home

Yeah seen the "we'll part ex your homd guaranteed" kind of a deal going on for a while, but actually hearing folk going though with it. A pure win win for developers.
There are so many factors to it, all can be amended with time if folk are keen to make it better. Shortage of trades, shortage of materials (less just now), estate and letting agents making up stories about how many people have already expressed interest in the last 30 seconds *, mortgage and interest rate issues, the way lenders catogerize new vs older homes, the govs way of calculating gdp/national growth is adversely affected by new homes completed, people being people and want everything brand new just for them etc.

For me biggest issue is the fact we are still allowing private developers (who make more than the obvious numbers suggest due to the way they operate) to build on vast swaths of green field sites, developing them in the cheapest possible way for the most personal gain, and with the most detrimental environmental and social impact.
So many folk I've known my whole life have moved off to a new build in a horse field and then within a year lost contact with them as they just stop ever really leaving their 3 bed barret home, or can't easily leave as no trains, buses, cycling is essentially too dangerous (right out into a 60mph a road) and driving is busy as a small 500 count village now has over 10k and no infrastructure change have been made.

Cities arw always going to get bigger, but after 70 years post war of building these sprawling estates, why do we as a people allow it.