That’s a funny phrase and one that I think deserves ridicule.
Society should value savings, in fact historically prosperity is the result of savings and every fall from prosperity is accompanied by artificially low interest rates and low saving rates.
I don’t see how people would differentiate savings from hoarding when infinite compound debasement is supposedly the “smart” policy.
To be clear, I think people that say "hoarding" is bad, really mean to say that they think "saving" is bad and that they should identify as champions of consumerism.