Earlier quoted context omitted.
Nothing more needed to refute an argument of said quality. If I delivered one million finished apartments to your city anywhere in the world today, the average price would go down. How about ten or a hundred million? Q.E.D. Housing scarcity is real, whether you believe it or not.
I'm really not sure that's true. I don't know exactly how many were built, but Melbourne (Australia) added a lot of CBD apartments and the price continued to shoot up. Those were overwhelmingly tiny/cheap/low-quality/investor-bought apartments, but the fact is they were still there.
i.e. if your locality has additional issues, the solution is to fix them. Don't use them as excuses to build less housing for folks that need it.