The difference here is that having a player melt because the walked into a random building and having them have to check every stall or die is not fun if it constantly happens and is repetitive. The difference is a randomly generated world and developer created world. In a developer created world, where they plan the design of the map very carefully, they no better than to do that. Players will likely have similar experiences, and if things aren’t planned out properly so it feels as dynamic as possible, then alot of players will drop the game, especially in a game with permadeath. Thats difference though, Cataclysm ISN’T game that has worlds created by the devs, Its a randomly generated world. If you get a bad world, you can easily create a new one, and explore a large swath of land in a short time before dying inevitably. That time of exploration is important, and it is also fun. The RNG creates a world where it is possible to find zombies in bathrooms, The RNG creates buildings that randomly melt players (though obviously this has to have a way to detect, if it ever were in the game), The RNG leaves clans of Jabberwocks in the forest next to your spawn point, The RNG places your spawn shelter in the middle of the fucking suburbs so that when you go near the window to check out whats outside the static NPC blows your brains out with a poorly aimed shot. If this was Dev created world, then this would all be inexcusable. It isnt. Its created randomly.
Also, back onto the topic of basicly bodily functions, given how mixed it seems the responce on this is, lets just get modder to create something for it and see if it works.