There is nothing in this world as gross as dry, crumbly, overcooked burger mince.
You can incorrectly cook anything, including a round burger patty. That doesn't excuse "gourmet" burgers, it just shows that they don't know how to cook a good flat burger patty right. If it's gourmet, it should have a good shape and good taste. Although as always, "perfectly cooked" will be subjective to some extent.