Good points Calianna.
And then when they are faced with "get your affairs in order" it's way too late to change. I'm sure some of them think, "If only I had _ _ _ _ _ _ _ _ _ _."
And until we get to that point, we all seem to feel we are immortal, even if we know we aren't. I see young and old people smoking cigarettes, speeders on the most dangerous road in the county, and indulging in a lot of other instant gratification behavior that could have a drastic negative impact on the length of their lives.
But I remember when everybody smoked (including myself) was the thought "it won't get me" and that was reinforced by somebody we know or know about who smoked a pack a day until they died at 100 years old.
I quit carbs 'cold turkey'. I was trying other different ways to lose, my DW went low carb for a different health issue (she's never been overweight) and lost weight and seeing my frustration on being almost a vegetarian, she suggested that I might want to try reducing my carbs.
I did some research, and immediately cut back to Atkins Induction. I tried maintenance, but over 20 weighs on me
so I've been induction since then, only now we call it Keto.
OK it was hard to give up Welch's Grape Juice, bread and fried potatoes. But I figured if I was going to give it a try, I'd have to jump in with both feet.
Decades later, I don't miss the grape juice anymore, but sometimes those French Fries look good, especially if they are greasy and crisp. But I know it's like poison ivy, "You can look but you better not touch."
I understand not everybody can do that.
Bob