No I think the op-ed is trying to say that no matter how many homes we build, it won’t matter because those who already have homes can just leverage those homes to take on loans to buy more homes, preventing those who don’t have them from actually buying homes since they’re always at a deficit compared to those who are effectively already rich.
What I’m saying is that if the supply of homes increase by something like 40% across the board, it won’t matter if many of these people buy a second or third home, as it’s not like every person with a house is going to buy more. And even if they do, they’ll resort to renting them out because a home they’re not actively using is nothing but a cost that has a high chance of costing more than anything they can sell it for in a few decades due to property taxes. If they do rent them out, they’ll be competing with a massively increased rental market, lowering prices or else dealing with property that is costing money rather than making money.
A net win even if everything this person says comes true. And if it doesn’t, we have a massive influx of homes that’ll push down prices. The only issue is that we’ll be dealing with a new and long term recession as the retirement plans of millions go out the window. It’s a risk but taking this risk is the only way to prevent this problem from increasing perpetually, or else the housing prices crashing due to the bubble popping anyways.