Then have it be able to be toggled? It's not that hard to have the best of both worlds and not stuff on others.
it won't happen, notch thought about having hunger toggleable but decided against it, the only way to play survival and render hunger useless would be to put the game on peaceful. if he adds seasons tons of stuff would break. for instance, the farm on the lord of the rings server, that's hours of work. imagine if winter just came along and killed all the wheat, then they would be forgeted.