Wrong, value is created subjectively, by other people desiring the products of that labor. If nobody wants what the laborers created, then their labor had no value.

Roll a rock up and down a hill all day. You'll work hard as hell but you'll create no value. Anybody who denies the subjective theory of value is out to lunch.

Sit and stare at a rock and you have created no new value.

Labor can also destroy value, for example when a building is destroyed in a riot, or when a rock is pushed up a hill to a location that makes it less valuable.

but most raw material requires applied labor to become valuable: at the very least transportation to them

Everybody makes misteaks.