The same thing happens in web development. The developers and designers of news sites don't want to create an unusable mess of ads and auto-playing videos, but the business development guys love that shit.
Under the hood there's price discrimination on the Hypervisor and other services that regular users wouldn't use, but there seems fundamentally to be no difference in the interface between the two versions of the OS.
I'd assume enterprise customers (the real "pros") will have their IT department deal with removing all the crap and adjusting the group policy so the experience is somewhat productive. So Microsoft doesn't have to care at all about "productivity", and is free to bombard users with all the crapware of the worlds as long as there's some remote way to disable it.
The price was pretty stiff, so it looks like I got priced out of the reasonable default experience.
Ha ha ha. You know what happens when you "assume," right? I work for a Fortune 250 with 30K employees. We just "upgraded" the fleet at the start of the year. We're getting all the crap by default. It takes about 10 seconds for Edge to start and show the landing page with all of the stupid garbage. At least they NO LONGER prevent us from changing the start page on our browsers, and you can turn off the start menu crap. The only thing I can figure is that they got a discount on the licensing for leaving this stuff enabled. Like the general public, I assume that most people inside the company just live it.