I think it depends on what you're interested in or what you're studying. Learning about the theorists of the past is the basis for modern thought and it answers the question of how we have got to where we are today. So, if someone reads the great philosophers of the past, then it should explain why we are in the situation we are in today. However, I'm not sure that it's everyone's cup of tea as it might be boring for a lot of people and it won't have any bearing on their lives.
I think it depends on what you're interested in or what you're studying. Learning about the theorists of the past is the basis for modern thought and it answers the question of how we have got to where we are today. So, if someone reads the great philosophers of the past, then it should explain why we are in the situation we are in today. However, I'm not sure that it's everyone's cup of tea as it might be boring for a lot of people and it won't have any bearing on their lives.