This is going to sound a bit arrogant, but a person has only room for so many decisions for a day before they get burned for the day. This is why i prefer to pick a random tshirt, wear same sneakers etc every day (they are clean, yes). I tend to grab food from the same truck, at the same time - i do not think about it.
Doesn't sound arrogant at all. People are pressed for time, and the costs of spending time on clothing outweigh the benefits for many.