Mum knows best is the most none sense concept in the world

I don't know about you, but the idea of "mum knows best" is probably the most none sense concept in the world and I am not stating an opinion here, I am stating a fact.

Why do I say that? Well, the whole concept of "mum knows best" follow the idea that "Your mum is always right and you are always wrong, when you and your mum believe in different thing."

Now lets evaluate this believe with facts, Lets take for example, if a patient has brain tumor, it would naturally require the knowledge of a professional doctor to determine how to remove it, with the highest posibility of having the patient coming back alive and with no permanent damage. But if we let your everyday friendly neighborhood lady that owns the newsagent, who is never a doctor and never been to medical school either, determine how to remove the brain tumor, I think...well...the possibility for the surgery to be a success is, 1 in a million.

Now, if the lady who own the newsagent believe we should remove the brain tumor through method A and the doctor believe we should remove the brain tumor through method B and only one of the two characters are right, who do you think is more likely to be right, the doctor right?

Now, if the lady who owns the newsagent happens to be the doctor's mum, do this mean method A is all in a sudden going to more likely to be right in comparison to method B?

I don't think so.

However, if we turn it around, if the doctor is the mum and the girl who own the newsagent is the daughter. Who is still more likely to be correct, it is still the doctor right?

So conclusion, the concept of "mum knows best" is full of crap.