Nope. It intrigues me how human perception becomes absurd to the point that they call what they see. Goldfish wen growth happens naturally despite the selective breeding. In fact, wen growths are influenced by the amount of proteins and fatty acids consumed by the fish. At some point, the wen growth can overwhelm the fish especially if it covers their eyes. A wen trim should be in order in this case to prevent it from suffering total blindness.
The wen growth by this black ranchu is lionfaced wen. There are two other types, tigerfaced which covers all angles except the top part of the head and goosehead which covers only the head.
It's a nice black ranchu actually. You guys need to realize the least it can avoid is permanent blindness if the wen growth had covered its eyes otherwise a wen trim surgery is required to keep it from being incapacitated. This can be done if you're careful but I'd rather leave this to the specialized fish vets or advanced hobbyists who have done surgeries for goldfish.
Goldfish are no stranger to severely deteriorating water conditions however like all other fish, they become prone to several health issues as a result of the poor water conditions. Unfortunately for the fish, they produce a heavy amount of urea and feces especially when their metabolic rate is increased due to the elevated temperature. As a result, the water quality deteriorates rather rapidly especially when the tank is rather less than ideal in size.
Considering goldfish themselves do not stay small (which is why fishbowls are impractical nowadays) at 8 to 24 inches range, a general guideline for fancy types should be at least fifteen gallons per fish whereas pond types need at least twenty gallons per fish. Previous debates have been offered that the fancy types need a minimum of at least ten gallons per fish. While this point of argument does prove itself feasible, giving more allowance for space would be a much better option for the goldfish.
The above paragraph does not mean you can freely utilize the spare fifteen and twenty gallon tanks for goldfish. Those tanks are still very limited and you cannot keep goldfish in isolation as these are sociable by nature and unlikely to thrive for a long time if deprived of their company. With the number of goldfish suggested at three as the possible minimum, a 55g would be a best starting point for fancy goldfish whereas 75g would be the minimum for at least two to three pond types.