If you've got a shortage of resources, stuff better be repairable, as it has to last quite a while. Under these conditions it makes sense to supply service docs. Only a wasteful society can afford planned obsolescence.
Incidentally, without people wisening up about the latter, this forum might not even be here. After all, one motivation for getting a mechanical board is durability. There's enough cheap (and more worryingly, expensive) plastic trash out there that just isn't holding up.