Because there isn't a shortage of cars, and cars aren't necessary to live. However, housing is. Having a shelter to live in is a basic human need. It shouldn't be hoarded by rich elite few who own so much they basically control the whole fucking market.

If housing is limited and is a living necessity, it should totally be regulated.

Capitalism is an inhumane system that glorifies profit and undervalues human life and human rights. In order for capitalism to succeed, it needs cheap labour, it needs wage slaves, or even better, actual slaves. If capitalism had any provisions for social justice, equality, equity, respect of human rights and human life, it wouldn't even be viable.