I've done some factory automation. Something I learned is that automating the last 20% of the process takes 80% of the work. Removing the last remaining manual processes gets exponentially harder and more costly.

And often in doing this last 20% we come across the fact that the human portion of the assy process does so much more than it seems on the surface. Things like predicting and correcting for errors, keeping things going that aren't immediately obvious.

My guess is it is probably cheaper than fully automating the process with machines.

It is, or rather they may not have enough production volume to justify full automation. Buying the machinery and setting it up to automate a production line only makes sense when your volumes are massive.

I didn’t watch the video but $DAYJOB is a consumer goods company that manufactures, some fully automated some with human operators.

wood quality is quite variable so it's to be expected.