In macOS it makes it very clear which application you’re in (if you momentarily forget), and you can get to menu items quickly (if you’re not already using the consistent key commands already) especially when using a Magic Trackpad (just swipe down fast and you’re there).
Whenever I have to deal with looking at Windows, application windows look super clunky and it’s definitely not helped by windows duplicating inconsistent menus everywhere.
Have you seen Safari on macOS? Other browsers have to settle for hiding everything under a hamburger menu or gear icon, making the inconsistent non-native UI problem more apparent.
How have macOS (its correct name) and iOS been enshittified? As a daily driver of both I haven’t seen anywhere near the level of advertising and privacy violations on them as I’ve read about on other platforms.