Why should someone have to know Java? I know Java because it was the language of choice for my undergraduate software engineering lab (6.170), but I specifical

Why should someone have to know Java? I know Java because it was the language of choice for my undergraduate software engineering lab (6.170), but I specifically do not take Java work because I've found other languages I enjoy more. One of the joys of being a professional engineer is the freedom to choose your tools.