> What complexity?

What is a wl_registry_listener and why do I need it? What is a simple XGetImage() equivalent on Wayland? On Xlib function names at least give you an idea about what they are supposed to be doing.

> Also, how often do you write gui apps without any framework?

As soon as you have a Toolkit you don't need Wayland anymore. Windows then are just additional nodes in the object tree. There was even a demonstration of GTK applications running in a framebuffer without X11 way before Wayland even existed. If Wayland can only be used sanely with toolkits it indeed is completely pointless.