Do you buy hardware based on what it looks?
Just like people buy cars/homes/clothes/cellphones just because of how they look.
I'd argue they should look at the overall "package" when purchasing, but if looks are important to someone that's absolutely fine, and there is nothing wrong with valuing looks.
I was still using a MacBook Pro 17 from 2011 up until a few months ago. It is still rock solid with no creaks or wear/tear.
And let me ask you do you buy a car based on how it looks ? How about clothes ?
That's the benefit of plastic for portable, droppable, devices.