Earlier quoted context omitted.
I don't think expecting Apple to implement every single pet feature of every single power user is something that is reasonable.
Aranging windows is not a "power user feature". It's a basic thing that all other desktop OSes have. If you think hotkeys are "power user" things then replace them with gestures. Mac has none. They actually do have windows splits, it's just unfortunate that they force a workspace onto them. If anything workspace is a power user feature. Many including myself rarely use it. I could not if I wanted to because it looks…
Also, FYI, you can split left and right on mac by hovering over full-screen button while holding the option key: https://imgur.com/a/VNSQR8l
It's not a hotkey, but it gets the job done.