> Every luxury unit that is built lessens the pressure on housing demand.
That's true. We need to build more units. But for the price of one luxury unit we could have 1.N affordable units.
Also, building luxury units often displaces existing residents and replaces them. Yes that might be necessary, but it also should be humane -- it's not acceptable to just evict everyone on a block and shrug. We need to be aware of the impact of evicting families in the name of progress.