I think there's a bit of a "marketing" failure happening in this context.

I've been exercising for most of my life, I'm the guy that has been going to the gym since forever to many of my acquaintances, and so they have often talked to me about how they want to start exercising or how they are doing etc.

Nobody, and I mean nobody has ever said anything like "I'm so happy to decrease my risk of diabetes". My father stopped smoking and started riding a bike, motivated by cardiovascular health, what actually makes him happy though is to be able to go up the stairs without breaking into a sweat.

Ask anyone in a gym why they exercise, they will talk about health, just not in the way doctors do. The stick of "You will die in 20 years rather than 35" pales in comparison of the carrot of "you will feel better basically all the time"