Here's two complaints: it's a security theater, and it's horribly balkanized by design.

On X, I can run tools like xmacro or xdotool to automate the desktop to my heart's content. On Wayland, this isn't supported "for my security" and my remaining options boil down to either using a tool that works one level of abstraction lower (requires root and/or a daemon), or a tool made exclusively for my DE if one even exists. What used to be a cohesive environment with portable knowledge and tools is replaced by incomplete, broken, or outright missing tools and a complete lack of parity across DEs. For what? Am I supposed to be happy about this?

What is the point of automating another UI/Desktop than the one you are actually using? If you allow people to build different type of systems you can't expect them to function the same and have the same API.