It is not. macOS/iOS had it for a long time with AppKit, UIKit. But the progression is usually this: you start with Interface Builder and storyboards or .xibs, then you see the problem with that and gradually move to code-only UI and then start looking at SwiftUI with it's declarative UI like a guy in that meme. GUI for layout just does not cut it, especially when your app runs in very different environments - it can be macOS, it can be a phone or just a smartwatch/widget.