This type of candor is always refreshing, especially the open acknowledgement of how the shorthand language of pop art informed their design choices on female goblins.
Much like with SciFi, almost all alienness is still represented in a male/female binary framework. "Why do all the female aliens have boobs?" a designer may ask. "Because how else will the audience identify her as a female?" Is the typical reply.
Our creations are always a reflection of ourselves, but when those creations get off the beaten path of human experience, stereotypes always seem to pop up to help with design shortcuts.