That is probably the key weakness of any course taught by people more interested in selling training than being honest. Wreck diving isn’t safe even when you are surface supplied and have teams of professionals throughout the operation. Wreck diving in Scuba is a great deal less safe than that. Throw in being miles offshore, amateurs (in the non-derogatory sense), decompression, leisure budgets, cold water, low visibility, and sloppy seas and it gets even worse. Everyone who dives on wrecks is unsafe including John, every wreck instructor, US Navy salvage divers, and me.
Once a diver gets that fact imbedded in their psyche they will be a much safer. Want safe? Stay home in your garden and snack on the organic vegetables.
BTW oldschoolto, nice doubles and bailout.