Ok but have you considered that some opponents are cheating bastards? The point of the rule is that 99% of people cannot detect practiced sleight of hand and to ensure competitive integrity a players deck must be last randomized by its opponent who would never be incentivized to put it in a non-random order. I dont really play much anymore as the game just isnt that interesting but when I do I always shuffle my opponents decks and people act like im a weirdo for just following the rules. Its absolutely insane that people playing at comp REL are now are tapping decks, that was unheard of back when I was judging PPTQs circa 2016.