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....
75 yo, can drive in the daytime. at nite drive for what, go
kopitiam see xiao mei mei and aunties liao.
Can also drive slow, at 50 to 70km/hr, not wrong too.
As I said, 75yo is only in legal term, a leeway for those who
are still able to drive on if they wish to drive on, but if you
want to retire at 60yo, it is all up to you.
10 years ago, I met TD older brother in their mid 50s to 60s
saying that they will retire at 60s or some even at late 50s, after
10 years, some already in their late 60s and early 70s, but still
driving, then you ask them, I thought you told me you want to
retire by 60yo, their reply will be "Got meh, did I said that, knn,
mai siao lah, retire eat what?? later got dementia, more illness
and sit until mad, who told you we want to retire early??"
