Perhaps you are hoping for something that might not happen - a wide spread adoption of an overpriced proprietary PC.
No. Far more driven by the expectation that Apple is using a factory that probably has a cap of 5-7K units per month. There is about zero rational reason to engage a factory that has demand that designed around the initial demand bubble when a new product starts up. The other 11 months of the year are going to dedicate how well overall the product does.
Apple has engaged the Osborne effect for well over a year ( in June '12 pragmatically announce new Mac Pro for 2013). So there is going to be sizable number of folks who defer buying. Apple withdrew the Mac Pro from the EU markets back in mid Feburary - early March. Again creates a demand bubble. Finally stops selling the 2012 models in October but don't launch till mid-late December. Another source of a demand bubble of deferred purchases.
So while yes some subset of folks who want "box with slots" will have gone elsewhere there is still a high likelihood that there is a substantial number of folks waiting to "pull the trigger". It may take 2-6 weeks for Apple to 'catch up' .
The "shocked" and "blah, blah, blah" are far more directed at this product versus demand bubble mismatch should in no way be a surprise to Apple or tacitly accepted by the folks who report such 'spin' unquestionably.
Granted those who want the latest and the greatest status symbol will immediately buy it, but those who actually want to do things with it might consider other options like iMac, MBP or even a PC.
The new form factor fits a sizable number of people who want to get work done. The notion that primarily just a "status symbol" box is myopic . Not everyone wants to keep all their data stuff into a single box. There are multiple billion $ per year storage companies that plainly illustrate otherwise. There are also a fairly broad variety of tasks that the computational horsepower inside the box can very effectively do.
Apple doesn't have to target the exact same set of folks the older Mac Pro targets. For one, some of them aren't there anymore (workloads plateaued and they have moved 'down' in the Mac line up). Second, catering to that group wasn't leading to insprising sales ( no way Apple would have let Mac Pro go stale if this was a 'hot' , or even midly hot, market. )
The price is a bit high, but whether value proposition works is far more critically balanced on whether the software shows in next year to unlock more of the potential. It isn't that the hardware is lacking in potential.