DeepSeaExplorer, I too don't think of diving as dangerous or risky in any particular way but certain aspects of any activity can be and that is where the two camps part company. It is not that we want to be dangerous, it is just that we can accept some level of danger as a consequence of the pursuit of our life and interest. The other camp is safety--safety-safety--if you cannot be totally safe then don't go. There is a huge difference in the two.
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You touch on a key aspect of this entire thread: why do we do risky things. I see three classes of "risk takers":
1) those that take risk, as you say, because they enjoy doing activities that happen to have a higher level of risk. It's the activity tthey like, not the danger. Captain would ride without a helmet, I suspect, even if it were
safer than wearing one, because he prefers the ride, not the risk.
2) those that take risks to achieve a goal that they or society at large deem worthy, even though they don't particularly like the risk --- they may not even find the activity enjoyable per se (a firefighter rushing into a burning building to save a life; someone climbing Everest ---it is an accomplishment, but apparently a miserable experience). Marathon running, iron man competitions and other endurance sports may fall into this category in that people take health and injury risks and endure great pain and hardship working to achieve some goal or target.
3) those that do risky things that are neither enjoyable in and of themselves, nor accomplish any goal, simply because they like the risk itself ...the you-tubers who jump off buildings or set their clothes on fire, for example.
It's like the technical instructor I knew that said he would train someone to dive to 300 feet if they had something they wanted to see at 300 feet, but not if they only wnated to dive deep for the risk itself. he would train category 1 and 2 divers, but not 3 divers.
I think we can all agree that risk can be justified for categories 1 and 2, but what about category 3? If you love to parachute from buildings, OK. But what about simply jumping through a plate glass window to get some thrill? It is the rise of category 3, spurred by movies like Jackass and the rise of the internet, that seems a hard to explain. Or are people entitled to view risk itself as a rationale goal?