What we eat and drink and the other vices in our life are just a small part of the equation. HOW you live that life is also very important too.
Those in their 60's+ now didn't work in an environment where they were constantly pushing to earn more and more, working crazy hours, living stressful lives etc. They lived a life where they weren't just chasing the next best consumer goods and processed foods. Family time was very valuable, TV's were a rarity, cars a luxury etc. They lived a life that they were a lot more content with then the generation in their 20'3, 30's and 40's etc.
HK has the buzz but a lot of is the "money, money, money" buzz. Must own that apartment, mercedes, country club memebrship, climb the career ladder, trophy spouse etc. The food might not be as unhealthy as your texas 40oz steaks and chips (no salad please) but then again the life here is probably more stressful with the demands of having to constantly do better, own more, earn more etc.