In the US, and I'm guessing most everywhere else, developers are part of the problem. They buy properties that may currently have affordable housing on them and redevelop to more expensive units. They're also responsible for the disappearance of ownable housing - over there past decades, they've been buying houses that have come on the market and turned them into rentals, or torn them down and put in denser rental units. They're responsible for urban sprawl, turning farmland into suburbs.

Some of this is supply and demand, but don't discount marketing and encouraging growth in demand for suburb housing over more sustainable urban housing.

Finally, when articles like this talk about "developers," they don't mean the people who know how to build buildings: they mean the mega corporations who are purchasing property to own indefinitely, removing properties from ever being able to be purchased by families. Even in cases as in the article, "condos" are just fancy rentals. You "buy" it, but the developer (who is also usually the ultimate property manager) gets maintenance and other fees - they're for-profit HOAs.

"Developers" provide little benefit, and such is vastly outweighed by the damage they've caused in contributing to the current housing crisis: the inability of younger generations to afford to buy houses, or afford rent, and the increase in homelessness in western countries.

One of the larger Nordic cities - Stockholm, Helsinki, something like that - passed laws a few years ago to restrict property developers in order to preserve affordable housing and prevent gentrification.

Property developers are not our friends.