You mean Futanari? That would be useless even outside the story plot
Not just futanari. Futa, generally speaking, refers to women with both pussy and dick. No balls is more popular in Japan due to a hyper-specific cliche artists over there are often pressured into, like with a lot of other hyper-specific cliches like deliberately avoiding furry stuff in favor of kemonomimi. Thankfully, there is full-package futa and kemono anyway, it's just not nearly as common.