There are deaf pilots out there and they "require" communications with the radio towers. There are deaf firemen out there and they "require" communication through walk talkies and such.
While your frustration is understandable, these two examples, if true, are cause for alarm. In such cases, accommodating someone's disability is endangering lives. Both the pilot and the firefighter are at a disadvantage for vital communications in an activity where the safety and lives of other people are dependent upon their performance. There is no excuse for not requiring every normal ability and advantage to effect that safety.
Because you lack an ability that 99.9% of the population has, and that is necessarily going to create limitations you may not like.
My first boss was a very "portly" Russian man, and when confronted with questions like this, he would respond "I cannot be belly dancer. That does not make be bad person, but it is what it is. I must accept and move on." We all face limitations based on the way we are. At 5'9", I never had any chance to make the NBA.
There have been several good suggestions of alternatives to commercial diving as an underwater career, some of them, like cinematography, well suited to your abilities. However, keep in mind that professional underwater cinematographers are cinematographers first, divers second - diving is just how they get to the job. You don't mention any background in photography, imaging, theater, or any visual arts, and you'd probably need to establish proven talent above water before anyone's going to put you underwater where there are even more factors that can blow the scene.
Most aquariums have volunteers beating down the door - they're not likely to pay you any living wage to do what they can get done for free. Everyone I know who's paid to do any diving in an aquarium setting is an animal care specialist with veterinary training, or trains performing aquatic mammals, which pretty much requires a degree in either psych or theater, with a minor in the other one.
The majority of diving jobs are really entertainment jobs, which require excellent communication skills, to the level that hearing is practically a requirement. PADI has even said they're in the entertainment business.
While you might find a career in diving, you're competing for some very low paying jobs against a huge number of people who walk in the door with an advantage you can never match.
It will help me if you guys give me tips and find a loophole...
Find a loophole? In rules that exist to keep people safe? Think about that for a minute. Bottom line, it's not a likely thing, and for good reason. The rules exist for a reason, not as the result of a conspiracy to squash your dreams.
This doesn't have to be a negative, though. You're no different from the many hearing people who get into diving and get filled with starry-eyed romanticism about a career in diving, only to post here and find out the pay is lousy, the work often grueling and uninspiring, and the burnout rate very high. Like those who post here almost weekly with such aspirations, you should understand that there's no better way to ruin something you love than making it your job, that you HAVE to do. I know many people who followed this path, most of them were not only in different careers within 8 years, they completely quit diving within 10.
Choose a career path on where you have distinct advantages, not disadvantages. There's a whole new science of strengths psychology devoted to this approach. Find the thing that you can do better than anyone else - that's the best thing you can do. Maximize your strengths, rather than overcoming your weaknesses, and earn lots of money to spend on diving on YOUR terms, not your hypothetical employers'. You'll be financially better off and you'll get far more enjoyment out of diving.
