Those 2 have not much to do with it, since there are hundreds of millions on people that have neither of those problems in the EU and USA alone and they still age just fine.
Almost all of them have to work to live somewhat comfortably. They also have to do their own housework and childcare in addition to paid labour, which rich people do not. Both of those, especially in combination, are stressful. Stress ages you.
Once you get to a certain amount of wealth, you never have to do labour again, paid or otherwise, unless you want to.
Not to mention that they can't afford dieticians, personal trainers, aestheticians, etc., as the rich do.
Those "super rich" people lose their hair etc too., today they can simply afford to do something about it. 50 years ago they looked like everyone else. The money is important to deal with the issue, not to prevent it.
But mostly only if it becomes a quite recurrent event.
The basics are, dont do drugs, dont smoke, dont drink (often/regularly), don't be sedentary, avoid eating processed food and ofc soda.
And then just wait for the next breakthrough that will repair our metabolism a bit so we can be here for a while longer til the next breakthrough comes around.