Curing is normally for mellowing out the harsh chlorophyll. It also has other uses in curing tobacco. As far as hash, and flowers, it removes some terps. I'm guessing there are no more terps to extract via water after water hash is separated. It is in effect, cured.
Only here to discuss cultivation theory, check out genetics and their reviews, technology for this trade, and cannabis politics. Not currently partaking in any cannabis pleasure other than discussions.