Bullshit. Heart disease and cancer (and a long tail of medical problems) cook up with age and kill ~everyone inside ~100 years. If you think that environment and exercise can fix this, show me the person who is 200 years old.
We would have to 100x medical research spending before it was clearly overdone.
You can 1000x the research if you want, a 50kg overweight person who doesn't exercise, drink alcohol and lives next to a highway is statistically fucked no matter what. You'd need straight up magic to undo the damages
You're not going to fix lifestyle diseases with drugs, and lifestyle diseases are the leading cause of death
“inside 100 years” is a veeeeery large span… there is a huge difference if inside 100 is 45 or 95 :)