i spent a fair number of years doing RPGs dice and programming them alike. 95% is just 95%. it is not 99.999999999999% 95% is just like saying 'you will never roll a natural 20 on a d20". Which, frankly, is the byproduct of an elaborate imagination.

I think if FF14 is playing with the chaos of saying, "well, it's theoretically possible to keep rolling 33 a hundred times..." then they need a self correcting RNG using an iteration to govern a given number of sets.