All the time - offstage. Rules are not physics.
Raise dead is really nerfed as well. While the cost isn't to high considering you get to live again, they limit it to just very high level practitioners and you have to be at their temple within 4 minutes of dying or the ritual won't work.
Say we all live in a D&D world, governed by D&D laws of nature and science/magic. Our friend wants to run us through a new game called Houses & Humans (or whatever more clever name you want to give it), in a campaign setting called “Earth.” As you read the rules of the game and the campaign setting material, what do you find wrong, stupid, crazy, non-sensical, etc.? What would immediately have to be house ruled? Heck, would you even actually play it?