Also, a lot of people who are diagnosed with type 2 are older. If you're in your 60s and 70s it's often difficult to make big changes, or to start getting active. People that age aren't likely to start taking up running or cycling. So it's hard to stay off meds and many of them end up having to do the injections. People who are younger probably have a better chance of avoiding that for longer because they can make those big lifestyle changes and they aren't set in their ways.
I just read today that children as young as 6 are now developing type 2, because of obesity.
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You can catch more flies with honey than with vinegar. That's great...if you want to attract vermin.