From the Mac Pro 2013 to Mac Pro 2019, Apple pushed the base level entry price up 100% . The MP as it exits now has a “low volume” tax on it . The Mac Pro was also at the top end of the Mac Pricng line up . So going ‘even higher’ was a move into an area it already was ’suppose to‘ cover. To a large extent Apple just abandoned the lower “half” ( probable way more than half in terms of unit volume ) of market/user segment they already were selling into.
The iPhone is almost exactly the oppose. It is at the lowest end of its segment . The user base here is dominate by extremely low price elasticity ( favor lowest price and low price variations ) .
Similar the iPhone mini was in the middle Of line up . There is tons of fratricidal above and below its price segment. Slapping a “low volume” tax on the mini lands it on top of iPhones priced above. Lowering the mini’s price brings it into conflict with SE ( and to lessor extent the n-1 and n-2 versions of IPhone that Apple sells into the lower price market also )
Apple ( and others ) spends lots of effort into selling notion that the bigger phone or bigger Mac costs more . This also was an impediment to the mini ( as the expectation is that it should be priced lower ) . Making the Mac Pro relatively monstrously large is actually aligned with the “ bigger container bigger price “ meme that they put so much effort into .
That said the Mac Pro is skating on relatively thin ice. Even with the ‘low volume‘ tax on the units , if the units sales fall below a minimal threshold Apple probably will kill if it. An even higher ‘ low volume’ tax would likely push it into a pricing death spiral . There is much higher level of fratricide with the MacStudio ( and max MBP ) than the 2008-2013 era Mac Pros ( with gpu and cpu of rest of Mac line up relatively limited ).
Apple is not doing what most mainstream workstation vendors are doing. Mainstream is chasing 600-900w discrete GPU power allocations and Apple is not.