1) it for all intents pretty much IS in a rulebook (maybe a rulebook entitled common sense). Its like a common law wife. And before you say "but its not written" I have to premptively ask, so what? Have you read the NBA's rulebook? Don't worry, neither have I, or 99.5% of the fans out there. I'm willing to bet the percentages don't get too much better even with the players. We all just understand/know the rules form watching/playing. We learn the rules as they are enforced, not because it says so in Section 141(b)(ii). Now if somehting is inconsistently enforced, that's one thing. But if its pretty much always one way, and everybody learns it that way, for the 99.5% of us who don't pour over subection (iii) its pretty much just the rules.
2) you must have missed my second paragraph. The proposal would actually INCREASE ref involvement, and at the most critical time of the game. All that would do is make the conspiracy stuff even stronger. The onyl way to ever fully eliminate that stuff would be to just basically elikinate the refs, say its playground ball, no blood no foul. Less reffing, not more reffing. Everytime the ref, as authority figure, makes a call, 75% of which in basketball are judgment calls, and the other 25% bang/bang plays happening very fast, everytime they make a call its a fresh opportunity for it to be "wrong" as interpreted by whichever fan is watching, and therefore suspect. Basketball has a structural problem that way as a sport. No other sport has such a huge number of fouls between two players, and only the umps in baseball make as many calls overall. It inherently makes it more succeptible to conspiracy theorists. Asking refs, who are routinely accused of being corrupt or incompetent, to now step in and make routinely game-winning calls in the final seconds of games is just asking for true nuttiness.