> IMO, macros and such should be to improve coding UX

Coding UX critically leans on familiarity and spread of knowledge. By definition, making a non-obvious macro not known by others makes the UI just worse for a definition of worse which means "less manageable by anyone that looks at it without previous knowledge".

That is also the reason why standard libraries always have an advantage in usability just because people know them or the language constructs themselves.