think about it from the captains position.....
im willing to bet that captain has to deal with someone 3-4x a week who claims to have been trained by jacques cousteau himself....someone who claims to dive the Andrea Doria 2x a month....or someone who claims their deepest dives were to 400 meters........all while watching them struggle to put on their split fins after strapping on a spare air.
unfortunately, personally responsibility seems to be a thing of the past......so if he drops some yaboo off at a 100ft dive site.....and they end up getting hurt, and they only have an OW certification.....well guess whos getting sued?...guess whos losing their business?....
if the person has their AOW certification....well the captain can pass that buck onto the certification agency.
you very well could be the best diver in the world, and might have lots of experience doing advanced diving.....the captain doesnt know that, nor is he, or should he, be willing to take that risk......
at the end of the day...you have no right to have the capt take you out....if you want to do deep dives, there are no scuba police, you are more than welcome to buy a boat and go out on your own......