The first generations lived several hundred years.
Even Avroham Avinu and his family lived well over 100 years.
As things got more industrialized and further away from natural remedies, life spans got much shorter.
Now thanks to modern medicine life spans are getting longer again.
But that is no proof whatsoever that the natural remedies that were used thousands of years ago, are no good.
There is a modern saying usually applied to politics;
Follow the money.
When someone advocates for or supports anything, that has economic or political ramifications, who stands to gain from it?
Many Doctors for many years (possibly still today) were dead set against the Chiropractic approach to fixing back pain and problems.
They get much money from operations where the spine is fused together permanently reducing a persons flexibility.
Chiropractic costs far less can often fix the same problems and the patient goes away with more flexibility not less.
But the hospital does not get $3000 per day for the use of the room and the doctor does not get $50,000 (or more) for the operation, after which, he enjoys the rest of the day at the Golf Course while the patients once back at work have to work overtime (if they can get it) to spend years paying off the bill.
They market heartburn pills when simply drinking water during the meal will eliminate the heartburn before it starts.
I know from experience I used to get horrible heartburn till I started drinking more water during meals.
But again no one was ever admitted to a hospital for failing to get heartburn.
The more and longer someone is hospitalized, G-d forbid, the more the hospitals and doctors rake in the big bucks.
Follow the money….
The same is true for lawyers.
The lawmakers will never ever vote in a flat tax system and simplify everyones lives and make living cheaper while still providing plenty of tax dollars to run government, because
the lawyers make billions from all the impossble to understand and conflicting tax laws.
70% of all US Congresspeople and Senators, are lawyers.
Follow the money….