High prices mean more profits, which means more supply brought to market, which means lower prices and normalized profits. The cure for high prices is high prices.
Lumber is down 50% since the peak when he highlights that article.
Home prices are determined by supply and demand not by Blackrock or mysterious people on Wall Street. Speculators don't cause high prices. If Blackrock buys houses for more than they are theoretically worth, then they will lose money. If existing home prices rise to more than people can afford, then new homes will be more economical to build which will bring existing home prices down.
Basically nothing he said is worth listening to, assuming you believe markets work.