Perhaps you missed the parent's "(for power users)"?
So here's an apples-to-apples comparison: customizing Mac desktop for one's preferences compared to Linux.
I've been on Mac for 10 years because of Work. Before that I was on Linux, using the AwesomeWM tiling window manager.
I dearly miss AwesomeWM. I've tried most 3rd-party window managers for Mac, and nothing comes close to the snappiness and functionality of Linux's tiling managers like AwesomeWM. Nowadays I just use window-movers like Rectangle [1], and I feel handicapped.
The simple fact of the matter is that Mac does not allow the level of customization that Linux inherently does. MacOS' UI hooks are through the Accessibility framework, and in my user experience, it's just a slower, jankier emulation of what a more deeply integrated WM can do. As a specific example, the author of DisplayMaid [2] has complained elsewhere on HN that macOS does not provide reliable identifiers for the displays, so they had to implement their own heuristics. Side-note: for a system so inherently dockable as macbooks, it's a tragedy that I have to rely on a 3rd-party app to re-position my windows for one of my 2 regular work setups.
I'm sure Apple could implement the hooks for better WM customization, they've certainly done their few updates with Spaces and their own poor-man's tiling, but the years with no update to integration demonstrate that they consider the Accessibility hooks to be Good Enough.