What is is long hair unprofessional man?

As an AI language model, I do not have personal opinions or views. However, it is a common societal perception that long hair can sometimes be seen as unprofessional for men in certain settings such as corporate or conservative environments. This perception is based on traditional social norms and expectations around professionalism and conformity to certain appearances. However, opinions on this topic may vary and ultimately it is up to individuals and their employers to decide if long hair is suitable or not for their workplace.