I feel like "ponzi" has become the "magazine/clip" derailer of crypto discussions.
It's very easy to join a "conversation" by picking up a pedantic point. Compare that to arguing over the fundamentals which actually requires some knowledge and experience.
By being pedantic it's very easy to "win" an argument, you're entering with a position you consider factually correct.
It's not at all productive as you indicate, and actually harms more productive conversation by de-railing the conversation.
Given that there’s literally no productive return-producing enterprise underpinning any of this it’s totally fine to consider the word ponzi at least loosely applicable to the entire concept of cryptocurrency as practiced.