no content mmo or otherwise should exclude players... why?
simple less players access, less players can do it.
You end up screwing everyone over because of not enough people to do the content.
and stop labling ppl or doing sterotyping casuals.

I had the time ti play ffxi but I still couldn't do most content because There was not enough players who could access it. Why should I get outed from content due to everyone has a full group.