Pace of play is a threefold problem: 1)The course itself 2)Slow players 3) USGA rules don't make play fast.
USGA rules don't encourage fast play, you want add two strokes to your score or would you rather have a chance of making par, that means you need to find your ball! More than half of golfers don't go back to the tee for a white OB stake, so make it one stroke and call it a hazard, too many courses use white stakes to try and control speed of play, but it doesn't work.
So it isn't just the golfers it's the whole system.
Just repeating incorrect things which have already been said doesn't make them any more true. It doesn't matter how many play OB correctly or not, those things don't cause slow play, because players don't play that rule correctly on a crowded course unless it's a competition. Thinking that it slows play is still a myth. My four ball plays in four hours or less while still observing all of the rules (assuming that we are being held up by players who aren't playing by the rules ). The best rule to know is Rule 27-2 - Provisional Ball. That will save you time AND still let you play by the rules.