Can a doctor really help you if he doesn’t have a good grasp of medical knowledge?
Can an auto mechanic really help you if he has limited knowledge of car engines?
Can an attorney really help you that isn’t fully versed in the law?
Without the proper knowledge, these people have a limited usefulness to you if you need help.
The more they know and understand about their field of expertise, the more they are able to help you and the better they will be at doing so.
How much knowledge do you have and how much do you understand about what you do?