The reason that is because much of engineers do is recognizing and sculpting timbre. Its not about doing perfect on a hearing test.
Know this though. Its a benefit to be able to hear as a normal person does. How would you like to paint if you saw red diferent than the average person?
But skill can make up for much of that, but it is a disadvantage. Lets not pretend it isnt..and no I dont have perfect hearing anymore.
