There are also ways around this. You can join softwood with screws made out of hardwood. There's a German company making those. Some companies join boards with

There are also ways around this. You can join softwood with screws made out of hardwood. There's a German company making those. Some companies join boards with aluminum nails. You can make massive wood from cheap material without glue. There's a company that makes boards with a wavy surface. Multiple boards lock together easily. They made a prototype bridge with very little fastening.