It seems like you could get into roles with a duty of care, logistic and deadline planning, social contact, etc.

And try to control with so many other non-transport occupations like nurses, therapists, hairdressers, air-traffic controllers, etc.

Ironically, the transport aspect reminds me of a prior correlation I read about for truck drivers and higher rates of colon cancer. There were speculative theories as to whether it was from the hours sitting or something like the chronic vibration.

That would normally make sense, but Alzheimer's treatments don't significantly prolong life. You'd also expect to see the same effect with other medical professionals.