Very surprised to see some arguments in the article saying lumber only make 4% of construction prices. I'd love to know what type of construction they're lookin

Very surprised to see some arguments in the article saying lumber only make 4% of construction prices. I'd love to know what type of construction they're looking at. We're currently in the process of building a house and current lumber prices (because of covid mainly) are definitely impacting costs, to the point that it's one of the first thing that both our architect, and then builders mentioned. Everybody involved in the trade have mentioned the idea of waiting an extra year before building, mostly because of lumber prices.