> Out of curiosity, why wouldn’t we want the government managing mortgages for the whole country?
> Real estate seems like a pretty important part of the economy...
You just answered your own question. Governments do not have a history of distributing scarce resources effectively. You need various market forces.
> the government artificially making housing more accessible for potential first time buyers creates a virtuous cycle where people can finally save money and the eventually spend that money to stimulate their micro economies
This is not what happens. As you said - it's artificial. Markets, like the internet, route around this sort of censorship. Any attempt to make housing artificially more affordable will have the effect of increasing demand (by design). When you increase demand, prices rise. And thus becomes unaffordable again. You can then increase the subsidies further to try to offset your original manipulation, which will only worsen the problem. This is precisely what happened in the 90s/early 00s and the result was the 2008 housing bubble.