With respect to your thoughts on exaggeration, that has been a topic of debate for some time now. How one relates cannot be divorced from their perceptions unless someone is micro monitoring them, and this is not a court of law where one can object to someone's findings and how they relate them to others.
Not everything is hyperbole because someone else lacks the ability to describe it as well or as poetically as another. Their system can be more resolving, allowing a more significant improvement compared to a lesser resolving one despite trying the same thing. It doesn't negate or lessen one's findings. It's just different.
All the best,
Nonoise