Does it matter? Even if a lot of people only get into beekeeping when they're retired, well, that's OK... recently, lots more people have taken an interest in beekeeping as a hobby, so it doesn't look like it's going to die out due to lack of newcomers. The only loss is perhaps the loss of beekeepers with a lifetime's experience - but then they were never that common!
Interestingly, several of the "professional" beeks I can think of, i.e. those attempting to make all or part of their income from bees, have been young men (i.e. in their 20s). Plus, the oldest beekeeper I know has a young protegee - his great-nephew is keen to become a beekeeper and join the business. It's very pleasing when that happens, and a sign that established skills may yet be preserved.
