People who don't want to get dragged into some kind of work often develop a protective incompetence at it. Paul Erdos was particularly good at this. By seeming unable even to cut a grapefruit in half (let alone go to the store and buy one), he forced other people to do such things for him, leaving all his time free for math.
I don't use this strategy. But I do use the strategy of cooking things in ridiculously large batches, which isn't much more work than small batches; then when I want something to eat I just fire up the microwave.
(I'm not sure if I can cut a grapefruit in half; to do that without struggling might require some special knife I don't have. I haven't tried, because I don't like grapefruit.)