The intention of opting out of community ID is to give users control over how their observations are labeled in their profile. The tradeoff is that sometimes they become casual grade automatically (if not ancestor/descendant, e.g. example #1) or manually (example #2).
As far as “what can we do”, I’m not sure I understand what it is you want to do. I know I’d like to be able to find observations that are otherwise “community verified” where the user opted out of community ID, which is one reason why I’ve requested we be able to search observations by observation taxon and by community taxon here: https://forum.inaturalist.org/t/search-by-observation-taxon-or-community-taxon/3620