I see, thanks. There are waymarked hiking trails all over Scotland, where markers tell people where to go. An example is the West Highland Way. We tend to keep route=hiking relations for these cases.
That's not usually the case on the hills. There may be a sign by the car park that tells hikers where the path starts, but there isn't usually waymarking on the path itself, or guideposts in the mountains like in the Alps.
It could be confusing to have route relations in OSM for route suggestions that aren't actually waymarked on the ground.
I understand that you want to show a route in WikiVoyage but isn't there another way, that doesn't involve creating an OSM relation? 
And aren't there also copyright issues with uploading route suggestions from Rother into OSM?