Those are very abstract, I didn't start watching my sugar intake until a close relative got diabetes, despite the fact I had distant relatives with the disease, I saw it every day, and I consciously understood that it was something to avoid. Unfortunately people don't "get" things until they are too close to avoid, a lot of the time.
The problem is that the feedback from the behaviour is not immediate. This is ultimately why it is not easy to be disciplined about a lot of things for which the results are only apparent after a long time. There is no easy way.