The use of using <mo> macros vs targeting with Function keys and the like is super-personal though. Everyone has a different keyboard+mouse set-up and a different way of setting up their UI which affects how easy it is do do <mo> healing (some people prefer clicking hot-keys with the mouse!). What works great for one person often doesn't work well for other people. If the OP really wants to use <mo> macros then don't just go trying to make them re-learn how to play the game just to suit what you feel is best.

What matters is if they play the game well enough to get though most content with the least amount of frustration for everyone they're playing with. And nine times out of ten that has nothing to do with how they set up controls on their end.