Sure, but how many studios exist worldwide? Let’s say 10,000. How many are in the market for something very high end from Apple? Maybe 10%?
So, 1,000 * $20,000, say. $20M is a lot for you and I, but it’s… nothing for Apple. Prestige and/or nostalgia (Ternus seems to have a weak spot for it) aside, I think the Mac Pro exists largely to stave off the threat of customers moving platforms altogether, not because it, per se, makes much business sense.
That is likely too low for 'music' and 'movie'. It isn't just theater release movie or mega distribution music. Apple is recording major segments of their keynotes. That doesn't get released in a theater where try to gross millions in ticket sales and yet is really work. it is the number of people getting paid to do video/music not the highly visible content products being released.
More likely the Mac Pro run rate is in the 40-100K/year run rate range. So you numbers are likely off by an order of magnitude.
That is a bit offset by the average sales price. It is likely no where near $20K at all. Apple explicitly mentioned that the 16 core CPU and the W5700X were the best selling components of their class ... and those two together are not going to put a Mac Pro configuration cost anywhere near $20K (average selling price ) at all.
50K * $9K = $450M (NOTE: same ballpark 100K * $4.5K = $450M )
50K * $8.5K = $425M
30-40K is likely a "not tall enough to ride the product release rollercoaster' threshold at Apple. Too few to even get over the overhead of having to deploy in the countries Apple deals with and get over the middle management overhead of dealing with the product.
I think folks have it backwards when they label the >= $20K workstations as being the 'real pro' workstation market that is the primary driver for the space. So the $7-10K workstation have to 'suck it up' and do/buy the infrastructure that the 'real pro' workstation needs in their systems also.
It is mostly the other way around. But even 40-100K is likely too small a run rate carry a unique chip/die given Apple's overhead and pragmatically finite resources. The > $20K configurations just happen to 'fall out of' what some additional components could do over the core product target. ( similar to how the Xeon W6200 product just happens to fall out of the Xeon SP Gen 2 product line. Intel is primarily trying to do the SP not the W6x00. Not enough unit sales of the SP and there won't even be a W6x00 variant. )
There is also a huge pragmatic difference between deployed total system costs and the price that Apple is seeing (getting). $7-10K into the Mac Pro and another $7-10K into the non Apple Mac Pro components to finish the completed system. That ~ $10K of "Other stuff" sunk costs is what partially drives the Mac Pro also. Very high end sound/audio capture/generation cards.
Partially why the MP 2019 got blowback from 'four 3.5/2.5 SATA driver " lovers for not having default 4 drive sleds (and the long term dubious R4i product to supposedly make up for that). And the even bigger blowback on the GPU cards path to nowhere on the MP 2023. Neither the add-ins that Apple has made a priority over the last 4-5 years in their transition plans.