This expression is often used when discussing ideas or explaining something, which is why it is commonly heard in a professional environment. It this regard, it is essentially another way of saying 'I understand your point of view,' or 'I understand what you are trying to tell me.' When you talk about 'where somebody is coming from' you are saying you understand their viewpoint or their feelings. This phrase can also be used to relate to or empathize with someone, particularly in a social context.