I chose Ghostty instead of Wezterm specifically because the settings file format makes it possible to get a GUI some day. I don't even know if it's officially considered for Ghostty but at least it can be done, even by an external tool.

VSCode started this way and for a long time settings could only be updated by editing a JSON file. The fancy settings UI was added much later on.

Wezterm config being Lua makes it almost impossible to get a UI ever. Also I don't understand why a terminal emulator config needs to be written in a general purpose programming language.