BESIDES not having any particular way to validate a token without asking the service, making the rate a hell of a lot slower than 2^64 tokens per second (lol wut) doesn’t it also assume that you have 2^46 valid tokens in existence? Isn’t that 70 TRILLION valid tokens, or nearly 9000 tokens per human on earth?
I'm sorry to say that this argument is not even wrong.
As programmers, it is not useful to us to think about that 99.9% of time. The 0.1% of the time is literally our entire job.
"Most of the universe is not Earth, so why do we spend so much time thinking about things on Earth?"