The topic is about idempotency though, and what you are describing is not idempotency. You are describing something different, and arguing “but it accomplishes a similar thing.” It appears you have come to the same conclusion as the article that building idempotency isn’t trivial.
Proprietary techniques like this are usually a good indication you’re missing something. In this case it sounds like you are missing appropriate validation of the issuer and/or token itself.
Like the one where 1.5T in value went pfoof due to reasons you mentioned? I will let people judge whether your arguments are most likely, or whether this is bubble syndrome. Hint: there is a large distance between use of smart pointers and market effects.