Hello there, the DWG has been made aware of this issue and we're tracking it as 
Ticket#2025110310000364.

The general rule is that if we map something in OSM, it has to be visible on the ground. Just because someone who writes a hiking guide decides that a certain trail is a nice one-hour walk, we don't add that to OSM. The CAI is not exempt from that rule; they might be bigger than a single guy writing a guide but if they sit down at their drawing board and decide that a certain walk is nice and gets number ABC-123 that doesn't give them the automatic right to record that in OSM.

However, this is not a rule that is set in stone. For example, if the CAI are planning to (and have the authority to) eventually erect route markers but haven't got around to it yet, a case could be made for allowing these relations. Same if maybe the route markers largely exist but there are some small stretches where they are missing. Or if a route is not marked, but it is so well known that you could practically ask anyone "what's this route I am walking on" and they say "ah, it's the ABC-123 route". 

I think this is a matter that deserves a proper discussion on the Italian community forum. I have therefore created a thread here:
https://community.openstreetmap.org/t/deletion-of-cai-hiking-relations/137727
I have reverted the deletion of the route relations for now but I am not saying the deletion was unwarranted; it was only premature and the outcome of the discussion might still be to delete them.

