This is a common sentiment that, I think, misses the point and makes a lot of the discussion around housing costs unproductive.
I'm a homeowner and I've seen the resistance to new construction. The concerns are often
* more traffic
* more students at schools that are already overcrowded
* more noise
* etc.
Also proposals to build more houses often are planned on property that is already occupied. In a nearby area they want to tear down an existing school, in other areas they want to take away open space that is used as walking/running/biking paths.
Now I'm not going to pretend that homeowners are otherwise pure and virtuous and not even slightly concerned about the price of their house. But that's rarely the only concern.
I don't say that to shut discussion down - maybe homeowners are still wrong to have these concerns. Maybe they just need to deal with more traffic and trust that the schools will address overcrowding as needed.
But that conversation never happens. It is _always_ greedy homeowners who worry only about their house price at the expense of everyone else. As long as the conversation is framed that way, I don't think it will ever move forward.