While this is possible, it is extremely improbable. Pretty much anything that goes wrong, that would be survivable on a 10m dive, has a very high chance to get you killed on a 300m dive.
Look at the stats of dives below 240m, incident rate and fatality rate. It’s freakin high. Look at good old Sheck Exleys top root causes for cave fatalities: excessive depth is right there.
Don’t get me wrong, I have the greatest respect for the virtues required to attempt such a dive. This includes commitment, discipline, fitness, meticulous planning, bravery not to say balls, and many more. I’m just wondering if these virtues could have been put to another use with lower fatality rate or higher benefit for society ...
On the other hand it’s human nature to push boundaries, challenge limits and try new things. Otherwise we would still be sitting on trees while chewing leaves. It’s just sometimes hard to get this in the right perspective. I mean, you could challenge how much sense there is to landing on the moon (and the fatality rate across nations to get there). In hindsight it brought quite a few technological advances. Whether scuba (taking into account the relative budgets) will do the same, we’ll see ...
