That doesn't, of course, preclude their coming from all walks of life. To my knowledge, we have a schoolmaster, a nurse, a waterways professional, a tree surgeon and a boiler engineer in our ranks, and no doubt people from other jobs too - I recall a member a few years ago who was a bus driver.
We certainly have females in our ranks: at a quick mental countbI can think of at least four who are regular contributors. There may well be more, as some members do not divulge their gender
As far as age goes, you may be right, as boats are expensive and it tales people a while to save up the money to buy one. I was in my forties before we could afford to get a second-hand boat without being saddled with an overdraft. But we are a heterogeneous group; I reckon that the only thing that boaters have in common apart from boats is that they're all different. Have a look in the Politics section and you'll see a wide spread of opinions being expressed. So yes, there's plenty of diversity on here.