This is a flawed comparison because you do not need to "become a doctor" or read up on medical science to know that there is currently no way to get another pair of functioning human arms on top of the two you already have.
By the way, there are surgical options to grow taller by lengthening the limbs [1]. I'm not a doctor.
The comparison is spot on. You do not need to "become a developer" in order to understand what is within the realm of possibility for developers to do.
And a BizBrah who was somewhat versed in the medical vocabulary would have the ability to research a problem the dotor says is not possible, provide a link to an implemented solution, and the whole project benefits.
The medically educated patient knows just enough to challenge the patient rather than blindly asking for the imposisble
By the way, there are surgical options to grow taller by lengthening the limbs [1]. I'm not a doctor.
[1] http://abcnews.go.com/Health/york-man-grows-inches-surgery/s...