It's just burger wabi sabi.
This seems the most likely explanation to me.
It's just much more visually interesting than a page full of perfect burgers. Each one looks like a unique thing from the real world; they don't "look AI", as the kids say these days.
Burger chizutsugi needs to be a thing.
Like go pieces being deliberately too large for the board they are used on.
You guys learn one term...