We have a realistic understanding of software development. We either work as software developers to make our living, or we do it as a hobby. Either way it's years ahead of the level of experience that leads to the sort of questions as originally posed in this thread.
I can't find this fabled website with the noted discussion. People will say a lot of things to get noticed. They may as well have said they made their own version of youtube and hosted it from home. Most charitable interpretation would be that they created a MUD, which seems likely since it was a big thing some time ago- even so calling it an MMO is a bit misleading.
It's not that hard guys...
I've been a software developer for over 10 years and I like to think I have a reasonable idea on how software development works, and one of the easiest rules is that anything you think is going to be easy is not going to be easy. "Trivial" operations get loaded down as you suddenly learn about edge cases through testing, etc. Even with that in mind I still think "That should be easy" and it becomes a non-trivial mess. The devil is always in the details and from a surface level one might not consider those.