What is the cause and what is the effect?Those I know who had their own compressors enjoyed diving 100 fold.
Are you saying that if people had to own their own compressors, they would enjoy scuba more, or is it that the tiny number of people willing to shell out thousands of dollars to own and maintain a compressor did so because they already enjoyed scuba?
As for me, that lower bar for entry to scuba that you mock was important. I had a vacation planned to Cozumel, and I cannot sit on a beach and tan, so I took a quick and inexpensive course on the theory that I would dive a couple of days on that vacation and possibly on future vacations to tropical locations. I was envisioning possibly 6 dives every few years at the most. If you had told me I would have had to take weeks of training, with mile swims, long training runs, and the other physical fitness requirements you have regularly promoted in threads over the years to be certified, I would have looked for some other way to spend my time. If you had told me I would need to own my own tanks and compressor, I would have laughed out loud.
My initial vision of occasional shallow dives in warm, tropical climes morphed into what I do now. In the past 10 months, my average pleasure (non-instructional) dive has been well over 200 feet deep, in water about 60 degrees. I think that is the kind of diving that you think would attract divers to the sport. In my case, it was just the opposite. I was attracted by the kind of diving you ridicule, and I very slowly changed into the diver I am now. I had to find out what scuba was really like before I could get the interest in taking it to where I am now.