For me its purpose is simple.
If my money is a representation of my time and effort, why should I accept the central banks' inflation "target" of even 2%, due to money printing? I don't see why anyone should be okay with that, particularly given that central banks rarely meet that target for long and more often than not overshoot by a significant amount.
It's insane to me that anyone should expect the purchasing power of their money to reduce, debasing their own time and effort. Why is that acceptable to people?