It’s deliberate but almost always temporary for events. RP realms are a bit unique in this regard because most of us RP in our capital cities - Orgrimmar and Stormwind.
As for where this was posted, if this is the incorrect place for it, it wasn’t done on purpose. I will say it doesn’t really fit in suggestions and feedback though since this is already kind of an internal rule for RP realms, they just haven’t flipped the sharding switch off again.