In this context, a Mac Pro whose cost is between the iMac and the iMac Pro makes little sense, when you consider that it’s purpose ought to be to handle really powerful tasks that even the iMac Pro cannot handle.
Again - the iMac Pro is
not for people who want something more powerful than an iMac: It is for people who want something powerful
with zero internal expansion and a built in 27" 5k glossy "pro-sumer" grade screen. The iMac and iMac Pro are probably the best value-for-money that Apple offers, but only because they include a $1000 display. If that screen doesn't fit your requirements, they're back to being astronomically overpriced.
There are a lot of reasons for wanting a
headless tower system with
reasonable internal expansion other than MOOOARE POWWWEERRRR MWHAHAHAHA!!!! - perhaps to be able to use your choice of GPU and display (maybe you need a screen designed for professional print work, maybe you want a 40" 4k screen that is usable in 1:1 resolution... maybe you want a matched pair of smaller screens). Maybe you need one or two specialist PCIe cards to interface with your equipment. Maybe you need one or two
really boring PCIe cards - someone in another thread is just needing a shedload of top-level USB ports - there's a lot of audio/music stuff that only needs USB2 but doesn't play nice with USB hubs.
Yes, there are hubs/docks/eGPU/external PCIe enclosures and such... or, get a mini tower PC and have them neatly tucked in the box without having boxes and power cables all over your desk and a long list of technical caveats.
The Mac Pro is a classic case of the "if some is good, more is better" fallacy... and is
still a jack-of-all-trades personal workstation that won't compete with purpose designed high-density, server, GPU-based computing etc. hardware.
As such, it makes sense for an underpowered entry level model to exist, even as I admit that yes, nobody in their right mind should buy one, because you are expected to build on that.
Unfortunately, that underpowered entry-level model is
still the only thing we have the price for. I can't help thinking that - if that 28-core, quad GPU "beast" was attractively priced - they'd have told us.
True, all Mac models have low-powered entry-level options that you or I wouldn't buy - but mostly they would be sensible for someone who, say, just wanted a Mac for light office work, or even cynical reasons like "Buy More won't stock anything without at least 1TB of spinning rust". None of them are as plain nonsensical as the $6k Pro with a
non-upgradeable (True Pros don't void the applecare on day 1) 8-core CPU and the GPU out of a non-pro iMac (which is not 'workstation grade' but neither is it a cheap 'don't care about GPU' option).
(...actually, I
do get it - it will help disguise whatever mark-up Apple puts on the CPU and GPU upgrades - so when they charge $1300 for the 12-core upgrade people will compare that favorably with the list price and hopefully forget that the base processor 'cost' $700 and they're effectively being charged $2000...)
As for your second point, I don’t think the Mac represents the future at Apple.
I think that's a self-fulfilling prophecy - as with the mobile mania that has infected the whole industry (if you throw all your efforts into mobile and services and stop innovating PCs then of course PC sales will slump).
The problem is that "the future" at Apple consists of next quarter's earnings call. It is very clear from the arguments here are from people who wouldn't/couldn't ditch Mac OS even if (or, perhaps, in case...?) Tim Cook broke into their house and boiled their pet rabbit. The policy of the last few years seems to have been "forget competing with PCs - how much can we wring out of the loyal user base with higher prices and planned obsolescence before they give up".
I'm sure Apple have done the short-term math and will sell enough Mac Pros to existing Mac users to claim a modest success and make a wad of cash. What they won't do is entice new customers, or keep those without unbreakable ties to MacOS (most of whom have already left the building after 6 years with no credible Mac Pro). You can make money from a shrinking pool of customers until the day that pool dries up.
Last time I was in a pro video studio, the shelves were lined with dusty Macs and
Final Cut boxes, clearly only used for legacy work, and the editors were (
very efficiently
) happily working on fugly-but-functional non-name PC towers running Avid.
The Watch has been a success, but it's hardly the new iPod/iPhone (especially because it will be landfill if the iPhone ever loses favour). Apple TV+ may yet be a success - but they've turned up a year late for the revolution, the big content holders are clawing back their rights and setting up their own services, while Netflix and Amazon have spent the last several years building up their own back-catalog of successful original programming. There are no dead certs there - its no time for Apple to quit the day job.