A hammer made today still looks like a hammer from a century ago.
No, it doesn't.
Hammers come in all kinds of different colors with all kinds of designs.
I bet you believe in UX too.
Why does it matter what colour a hammer is? What function does the colour have?
A hammer is the same basic shape it has been in for millennia. A flat sided lump of metal attached to a handle. Even the claw hammer is over 500 years old and looks very similar to a modern claw hammer.
The biggest innovation in hammers in the last 100 odd years was switching from wooden handles and leather wraps to plastics and polymers. Even then, this is a slow evolution rather than a radical change and was mainly done to save costs and did not in any way alter the function of the hammer.
Metro is like redesigning a hammer to have the head in the middle of the handle. Its change for changes sake and ends up being less usable than the old design. However people like you will advertise it as "Hammer 2.0" or the "iBanger" and claim it's magically superior despite all evidence to the contrary.