Driving needs alot of EYE-POWER.... (especially in the
night)
Driving needs alot of Reaction Time..... to avoid
accidents....
How can compare everyone
to be the same as LKY ? Are you as rich as
him ? can eat abalone, wash mouth with bird nest 
, drink herbs every other day ?
LKY no need to drive himself.... he got drivers....
Dats why it's good to continue driving till old. Once retire and
sit at at home, one will vegetate very quickly. Driving helps to
stimulate you mentally and also get daily income.
