Lamont, I usually enormously respect your input, and have for a couple of years, but in this case, I think you're a little off base, and somewhat influenced by what you have available to you at home.
Peter and I did a lovely day of diving in Los Angeles off a boat which is usually the purview of a particular club, which specializes in wreck "salvage" (AKA tearing big pieces off of boats underwater). I can't remember exactly how many divers were on the boat, but it was at least a dozen. The four of us were the only people even REMOTELY DIR on the boat. My guess is that no one else on it had even heard the term. The captain was very competent, and the briefings were clear. One dive was anchored, and the other two were live boat. (Live boat is unusual in LA; they went into great detail on how to enter and how we would be picked up, because most of the divers were not accustomed to doing that.)
We dove 32%. We set our profiles and our run times. We dove as two buddy pairs, and stayed together and in communication. We surfaced as planned and reboarded the boat without incident.
There was nothing non-DIR about our dive experience, even though it was sort of a "cattle boat", and certainly nobody else on it ran through a complete dive plan, did equipment check or bubble checks.
We should have run line on the first dive, though