Flash drives are not a lasting medium. You’d need something like a quad-layer blu-ray, which is not cheap and has slow read speeds compared to solid state storage. Also nobody has blu-ray readers anymore. Also blu-ray publishers are tiny. Also the expense of distributing physical media.
So we’ve arrived back at the beginning - you can have this cake and eat it too, but you’re going to have to eat the expense yourself. Imposing it upon the entire consumer market is selfish and wasteful.
On the flipside of this, I’ve been kicked from games because I know how to prefire, and a lot of players see that and just assume you’re wallhacking. Nobody pays attention to the 70% of the time that you prefire at air, but when you guess right and instakill someone holding an angle, it’s easier to say “cheater” than “i’ve been holding this same angle for the past 5 rounds, perhaps I’ve become predictable”