The video showing how a large tree trunk is cut down to size shows how efficiently such a cylinder is converted to building material. It might be a bit challenging for TeslaBot to do what this team of low paid workers are doing, as it is a matter of teamwork. They all have separate tasks, aside from their team tasks like rolling over the log when needed.
And this is not even the total amount of wood usage, since even the sawdust coming from sawmills like these is collected, and passed on to other factories that use this dust to create MDF and other wood-based materials.