[Baertram]

You maybe could BUT as I tried to explain it needs a LOT of manual lists of skills to abilityIds etc.
The addons that exist got "hardcoded" list of the abilityIds and their buffs or other ways to detect the "procs". There is no addon API that provides that by simple means afaik.
So as I wrotebefore: I doubt anyone wants to start such "manual overkill" addon for "all of the slotted skills" (which could be ANY of the available skills of the game + all the possible buss, on 2 action bars).
As the buffs AND abilityIds could change each patch it would need to be updated and updated and updated again at patches. None of the addon devs I know here would be interested into creating such a time consuming project, but maybe you'll find someone.

And imho, as I wrote above, this would be some kind of "botting" or "failsafe mode" (just press all keys and let the addons play for me) gamestyle, which is nothing one should support!