Sunfish, did you not read the above explanations? If there is a LOSA, the controller may or may not have stuffed up. In the example given above, an unrestricted climb to a level above opposite direction traffic may have one of two outcomes; either the aircraft will pass safely with the required separation, or they pass (or hit) with less than the separation that ICAO tolerances require. The separation is assured if action is taken as described, eg a level stop (set and forget) to be assessed later for further action. It is controller technique, not organisational arse-guarding.
A secondary aim is collecting reports of incidents where LOSA repeatedly occurs, which may then lead to review of airspace, tracks, rostering, whatever.