My observation is that a lot of professionals want more screens, not necessarily more computational power. Obviously, there are exceptions like video editors and people doing scientific research. They can use and justify all the computational power they can get.
Anyway, this new Mac Studio can support how many screens? (Answer - a lot) That answers that customer demand.
That takes a lot of GPU processing. They've gone to a lot of trouble to make the cooling efficient, presumably to support all that. That might have been a challenge in an iMac package.
I won't even attempt to justify their pricing for SSD, but the memory they use isn't exactly a commodity. So, it's not surprising the pricing is higher. Plus, this has obviously always been a high margin item for them. It sucks if you're a techno-savvy customer, but I wonder how much of their market falls into that category.
It's funny... For years, I've read complaints here that Apple ought to sell a mini Mac Pro for people who want something between a Mini and a Pro. Maybe make the package a little larger, with more ports. Add a nice monitor. So, they did just that. Now people are unhappy again.