The new Mac Pro is actually very competitively priced when compared to Z Workstations and other Pro machines. Yes, you could build a PC for cheaper, but professionals rarely do that. They go with workstations that have support behind them. So if you look at it that way, Apple is now the cheapest option for that type of pro workstation. Especially with the monitor. I've been in the market for a pro HDR reference display for DolbyVision grading, and the only ones on the market until today have cost around $50,000.
So before you start ripping on Apple for this Mac Pro, put things into perspective! Apple is seriously undercutting their competitors, and giving us a less expensive option that's arguably much, much better. Just because it wasn't designed for you doesn't mean it's not what real professionals want. This is exactly what we wanted!