This is so true. IMHO most of these repetitive work should be automated.
It is unlikely that we'll be asking AI to "build me an onboarding. Rather, we should be asking the machine for 3 options to arrange this layout, or detect inconsistencies across 200+ artboards, or consolidate repetitive components and styles.
This will free up our time to do the human thinking of understanding the problem from a place of empathy for the people we design for.
I'm really glad you took the time to put these thought into writing!