I'm single with no kids and my roommate has eating habits that are very different from mine.
Sandwiches get old fast, and processed foods are expensive.
While choking down yet another egg salad sandwich, I mentioned my dilemma to the usual lunch group at work. One had kids and found it difficult to get lunch together every morning. A third was single like me, but hated to cook and found it difficult to avoid prepared foods. As expected, each of us found that it was quite a relief not to have to worry about lunch for most of the week. It really wasn't much more effort to bring lunch for four than lunch for one.