Forging one (unpowered?) typewriter in many decades vs forging and powering all the computers you'd end up replacing over those decades to stay current? All the

Forging one (unpowered?) typewriter in many decades vs forging and powering all the computers you'd end up replacing over those decades to stay current? All the chemicals involved in making the electronics? The e-waste? A discarded typewriter would also leave very little behind aside from rust. While one option is not zero impact, it is still many orders of magnitude lower impact. They aren't equivalent, he wasn't fooling himself.