Don't worry, everyone must learn. And the OSM tagging scheme is not consistent and logical.

> So if you agree, I‘ll revert this delete.

Sound good. Note that correctly reverting (recreating the same node to keep it's history) is even harder than correctly adding new data. For simple cases like this where you want to revert the entire changeset without risk of conflicts, you can just drop the changeset id into https://revert.osmz.ru/ .