There is just a five year age difference between us.Good point, but also an example of the old adage 'Where you stand on an issue depends on where you sit.' I'm 53, so I was a kid in the time frame you're talking about. A few things different today...
That's all beyond the fact many of us live nowhere near the ocean, which is the main place most divers want to dive.
I am not sure when you began diving, though you managed to find the time -- and you're correct, there are plenty of other modern distractions and expenses nowadays; but people, whether they can afford it or not, will often still blow wads of "discretionary" cash on some fairly silly pursuits, like a Groupon offer for falconry some years back (where a friend later received fifteen stitches at a local ER); or a former classmate, who blew close to 5K, that he could ill afford, on a fantasy baseball weekend, where he met Mickey Mantle, then riding high on his second liver.
Many of my friends do live inland, in country and abroad, and swear by lake and river diving. Most of my US ice diving was in central New Hampshire -- great fun; not an ocean in sight.
It will always be a matter of priorities . . .