Thanks to johngie for your statement. I've already thought, that me and my caching colleagues were the only ones, to handle FTF in a broad-minded way.
If there is a group of cachers looking for a new cache, not all the cachers can search at the same place at the same time. So there will be a cacher with detects the cache first, but this might be pure luck and it could have been easily another one of the group. So, why not logging a share-FTF? It does not hurt the owner (I still feel no pain from mines) and all cachers of the group can have a FTF in their track-record.
Denying such doing will lead to egoistic behavior of the cachers and also to obstructive actions at multi-stage caches. This cannot be the goal of geocaching. A shared experience is much more valuable to all of the group.