For the majority of human history, we’ve eaten around wood (around a campfire, a hearth, etc), it makes sense it would become intertwined with our food palette
You can. I know a guy who eats a birch log every year. He literally sits on the couch pulling splinters from the log and chews on them while watching tv. He also grinds his egg shells and mixes with oatmeal.
It might interest you to know that we do eat wood when we eat that sprinkled parmesan or romano cheese in the plastic containers: It contains wood to prevent the cheese from clumping (and it counts as fiber)
Wood is notoriously hard to digest. After wood evolved, it took millions of years before funghi and bacteria evolved the ability to decompose it. And that’s why we have oil now.