The carbon fiber itself is tres, tres expensif.
And unless you're using carbon fiber, you won't need such a loom.
And producing carbon fiber pieces on a loom doesn't replace that many workers... it just replaces the ones who hand-lay carbon-fiber... probably brings the production cost of a half-million dollar exotic down to about $400k...

...but doesn't mean much for the regular consumer... yet.
There are other possible ways of mass producing CF parts that don't require complicated machines that can only weave parts at a slow rate... I particularly like dry carbon stamping, myself.