Developers are incentivized to build whatever units are most profitable, not what lowest income people need. More expensive units make more money.
Besides that, land and construction are both limited resources that constrain developers ability to “flood the market with small, high density units.” For example in high-land-value urban areas, developers need to build expensive units to be able to make a profit.
Besides that, land and construction are both limited resources that constrain developers ability to “flood the market with small, high density units.” For example in high-land-value urban areas, developers need to build expensive units to be able to make a profit.