Yeah I don't recall if the word shortage was ever used. Supply chain constraints maybe. Worker strikes. Weather. Natural disasters. Geo-Political. All good ways to justify turning the faucet on and off the suit the needs of your supply/demand curve and pad the investors wallets.
Don't like it. Don't participate in the market. Pretty much simple as that.
We ( the lumber company ) who sells to the consumer doesn't get to decide what we pay wholesale for a product so don't hate your local lumber yard.