His brown townogy is easy to grasp, but it isn't a valid argument.
http://skeptico.blogs.com/skeptico/2007/07/argument-by-ana.html
Based on your previous statements regarding it, it's not that easy to grasp (i.e. comparing your hotel and hospital brown townogy to rky's brick wall brown townogy).
Literally look at it this way:
You have a foundation (the MMORPG "recipe" if you will, or the brickwall).
You build on that foundation to make it something new/different (for the brick wall, you build a hospital or hotel, using the elements of your previous incorrect brown townogy comparison).
If the foundation is the only real part of the structure, then all the structures are pretty much the same, a foundation. Doesn't matter what shape or colour or material that foundation is, it's still the foundation.
It may not be perfect, but it works for it's intended purpose.
It's function. A brick wall always functions as a brick wall, but a hospital and hotel have very specific functions.