Macros that use more than one ability would appear to break the 'spirit' of playing with one button - as you claimed. So would casting protect.
Just admit you're wrong and move on, you can't complete the game using only a single button(command) and you know it, hyperbole is hyperbole.
Except you couldn't do it if you tried, no one can. remember this includes all the solo missions, story trials, primals and dungeons and you have a single command to pick from before you enter the content.
The truth is that running content with level appropriate gear and skills, along with other players similarly equipped and skilled reveals that the game is not as easy as you would claim. Sure if you're over leveled and overgeared, the degree of difficulty drops through the floor, in particular in content with little or no level/ilvl sync. But that kind of content and comparison is not a true measure of the game's difficulty, or your skill. Everyone who out gears a piece of content by 50 ilvls or more will appear to be more skilled because they can clear with ease. IMHO, if you actually believe the nonsense you say about the difficulty of the game, you're fooling yourself.