Sure, but you could e.g. start with slop and then let people request something different. That’s what I meant by ‘default’. Perhaps there’s a better world?
I sure there’s a fancy word in psychology, but it’s like if everyone is given choice x automatically, then it shouldn’t be a surprise that x seems to be what people prefer.
I’ve noticed a similar thing in the Subway sandwich store: there are approximately the same number of vegetables and meats available, but if you look at the menu there is just one ‘veggie’ option, and a multitude of different meat combinations.