In reading everything and thinking a bit since I last posted, I’m changing my mind a bit. If dive operations were large corporate operations like ski resorts, then I think a strict waiver like what happens when you purchase a lift ticket would be fine, and then when you take a lesson with an employed instructor, it’s also fine to mention any physical limitations to him/her at the time of the lesson, and they’ll adjust what and how they teach.
But diving is a bit more catastrophically risky than skiing, and dive operations a bit less well financed than ski resorts, and the instructors are far more exposed from a liability standpoint, so the extra procedural step of asking health questions and requesting a medical exam is both informational and allows the dive operations some protection so that they can grow as a business. Once that liability hurdle is passed, the student can be more open. It can be burdensome to the student and the dive operation, but the alternative (at least in the US) is far fewer regulated opportunities to dive at all, as I can see a lot of operations closing shop or becoming very restrictive in terms of who they will teach and provide air to.
But diving is a bit more catastrophically risky than skiing, and dive operations a bit less well financed than ski resorts, and the instructors are far more exposed from a liability standpoint, so the extra procedural step of asking health questions and requesting a medical exam is both informational and allows the dive operations some protection so that they can grow as a business. Once that liability hurdle is passed, the student can be more open. It can be burdensome to the student and the dive operation, but the alternative (at least in the US) is far fewer regulated opportunities to dive at all, as I can see a lot of operations closing shop or becoming very restrictive in terms of who they will teach and provide air to.