Not disagreeing, adding another angle: while the map is not the territory, tools and concepts are useful (to get a point across, to contextualize, to make decisions, …)

JTBD imho is one of the simple yet not easy (to do) concepts that is very useful, especially in the context of over-reliance on persona and correlation (“data”-) driven decision-making.

JTBD might be overhyped in some circles but where it is not overhyped it might just be exactly the concept needed to get out of a local optimum.