Fashion is secondary to preventing bees flying up open shirts, pants, shorts, etc.
The frames I use are pre-printed with a very light raised honeycomb pattern & the bees build off that. Without it, they would still build out comb in the general shape, but it wouldn't be as tidy.
The comb from this earlier photo was built free-form and was not on a frame. You can see they still build it in the typical honeycomb shape.
