Putting Siri in Spotlight on Mac makes a lot of sense. My MacBook Air is almost always hooked up to a display with the lid closed so it never seems to be listening for Hey Siri.
All of that is completely antithetical to the premise iOS 7 and iOS 26 are built upon.
UI elements constantly hiding themselves unless you use hiding gestures, hover states, and swipe to reveal means I can never rely on items to be where I expect.
I always have to look and check first.
UI "getting out of my way and letting me focus on the content" just means I can never tell what is UI and what is content unless I actually look closely at the app and pay attention.