When I was regularly in an office quite a few years ago, there certainly were days when I just didn't feel like cooking at all and would pickup takeout. However, I also had a stable of recipes that were generally in the vein of throw some things in a skillet and saute for 5-10 minutes. Especially with partially pre-prepped food in grocery stores these days, it's pretty easy to throw decent meals together quickly with very little time or effort given just a little bit of planning.