I particularly liked the DM taking his option to blow off any service obligations in favor of his own pleasure.
Let's be fair in one respect... it's quite likely the second DM had no idea that the first DM committed him to diving with the OP. Yes, it was incumbent upon DM1 to communicate that fact to DM2, but as someone else mentioned above, it would have been advisable for the OP to confirm the change in plans with the second DM.
I would bet that if you did an analysis of all stories posted on SB about problems people have had with dive boat operators - DM didn't give a tour, boat went to different wreck than advertised, they wanted to see my nitrox card, insta-buddy didn't follow my plan, captain didn't allow solo-diving, whatever - that 99% of those problems would have been completely obviated by better communication between the two parties.
Yes, in the perfect world we'd have great, service-oriented boat and LDS operators with phenomenal business acumen, doing a fantastic job of anticipating - and meeting - their customers wants, needs, and desires. In such a utopian dive industry, it would not be incumbent upon
the customer to be in charge of the necessary communication to ensure their wants, needs, and desires are understood.
I find the Venn Diagram below to be a useful reference when you're discussing any specific group of people and why they behave and act the way that they do:
The reality is that the dive industry is
not comprised of "business people" but rather it is largely comprised of people whose sole qualification is that they are dumb enough to try to make a living doing what they - and we - love to do.
God bless these people - because we'd all be on one big extended surface interval if not for them - but divers need to understand and accept this reality. Doing so means that divers need to take on greater responsibility for the outcome of their interactions with people in the dive industry.
Best regards,
Ray Purkis