[Miller]

On a side note, I'm not sure how exactly people already congregating into private areas means the solution to such a thing would be to make more private areas.

That's a gross misrepresentation of the point being made but:
The point is that there's legitimately no difference between someone RPing in some random corner of the map without any notifications and in a private house; people will exclude others regardless. Private housing is not a solution to that nor was it presented as one ever by any one in this thread nor is it a problem to be solved. People just sometimes want to RP with solely their friends.

The argument typically against player housing is often 'X/Y will exclude Z'. When that happens regardless of player housing or not, which makes the argument pretty moot.