What can you do on a Mac with Shortcuts vs AppleScript vs Hammerspoon?
Also some apps export Shortcut actions that can run in-app code: for example my Lunar app has an action that can help fixing arrangement when monitors flip around [1]
It's much easier to implement a struct for a Shortcut, than exporting AppleScript sdef files or creating IPC command-line tools, so a lot of apps take this route for code that needs access to the memory of the running app.
Being able to adjust my monitor brightness during the pandemic actively changed my quality of life for the better (I was in a small SF apartment).
That was also my pain point with Lunar, working on a small balcony in a small apartment where the light from the window was constantly changing and the monitor always being way too bright or way too dim.
I broke one of those LG monitor joystick OSD buttons before I got to building Lunar.