Because delivery only takes from foods value. Takes too long. Its way more expensive. And you feed companies that really have nothing to do with your food. They

Because delivery only takes from foods value. Takes too long. Its way more expensive. And you feed companies that really have nothing to do with your food. They drive like since they use company cars. You can't provide "right amount of immediate feedback" to chef so they can (and will) cheat on your food. The list of "why nots" can be really long. Why go delivery - you really cannot go anywhere out from whatever reason, or you are lazy(!, and that isn't really acceptable reason).