I don't have OCD, but easily notice inconsistencies in various design choices these mega-corporations continue to fumble.
It's less "OMG I can't focus on coding because Calculator and TextEdit aren't sharing the same border radius" but more "The UX/UI department seems like they're on perpetual vacation if Apple is letting simple things like this slip through", and this specific case is just an example, every version of macOS seems to get worse when it comes to consistency.