I can't agree with hardly any of that ... you're welcome to believe it if you like, but I don't. Then again, I enjoy solo diving ... had some of my best photo dives soloing.
On the other hand, I'm a dive instructor. And as an instructor I often dive with very inexperienced divers who require a considerable amount of my mental bandwidth while underwater. From a pure risk analysis perspective, I'm far more at risk of an accident when diving with those people than I am when I'm alone ... and able to devote my total attention to what I'm doing.... and I seriously doubt you have a good many friends with 50000 dives ... in order to achieve that level you'd need to log 1,000 dives a year for 50 years and I don't think that's even possible ... so perhaps that was a typo.
... Bob (Grateful Diver)
Yes, too many zero's, I have several friends that have logged over 5,000 dives. And 5,000 dives is not too hard to achieve when you've been diving since the '60's, and the only divers from that era that kept logs were the instructors that keep records for the insurance record.
I agree that for many of us, the greatest danger is working with new divers that can be very unpredictable. I also shoot pictures underwater, but to keep other divers from running off, I particularly focus on divers in my pictures. . . keeps them close just to see themselves.
Bob, you have been a source for your area for many years, and you are not in the same risk group, as new divers wanting to find a "card" to make them solo divers. When you complete a solo dive, I'm sure you know where you're at, where you've been, the conditions that fit in your "normal" dive. And , when those "normal" conditions change to dangerous conditions. The recent deaths of the football players, that went out in the morning with calm conditions then died when the conditions turned bad. Only with a lot of experience, could a new diver call the trip early and return to shore before facing changing conditions.
If my last post was too strong, I apologize, My experience has been that experience, lots of experience, count more than extra equipment, or an extra plastic cards.