Oh sorry to be unclear. The stat I was quoting was the top 1% of photographers. The average was $41,000 and at the upper end one percent of photographers earned more than $70,000. Of course that includes the superstar photographers earning hundreds of thousands, but it also indicates that if you can clear $70,000 a year as a photographer, you are doing pretty well by comparison to the average.A bit low for the top 1%, in 2020 it took ~$361K individual or ~$531K household income to pass that threshold. But the principle holds – those of us in that top 1% make more that a typical professional photographer.
As @AlanF points out, enthusiasts are also constrained by their ability to carry the gear. To the extent that wealth increases with age, the ability to afford and the ability to carry a big white are inversely related.
As to the other point, at 68 I am in that category that is concerned about the weight of the gear. As I've said, that's one of the main reasons I intend to sell the 1dX III and buy the R3 -- Not so much the weight of the camera, which is still significant, but because I can dispense with duplicate lenses.