These libraries are not more human friendly. Humans can write GTK or win32 or QT or Cocoa code just fine. GUI frameworks are very complex and often have very in depth setup code that is required. It requires a huge investment to get an app up and running with a GUI framework, and AI makes setting that up approachable when it was a real challenge before.
Have you ever written GUI code using one of the big GUI frameworks?
I, not the previous writer, have and PSG did exactly this. It made writting compact GUIs for smaller projects manageable without going into the deeps of GTK, win32 or QT.
I tried a bunch of Frameworks and some were easier (PSG, Kivi) and others much harder.