Also health. The idea thing to do is cook the food: cooking the food esp. chopping etc. I feel is good for mental health and prepare the body to digest. And you have moved somewhat. At least if you go pick up the takeaway, you have done some walking. If you are too busy to do physical things in day to day life, so you can crank out another page of code, or do a deal, I think that is poor and leads to bad health in the long term.
Whether it's financially responsible or not depends on the individual.