sorry, sos beg to differ.
We produce less insulin as we get older, so even if you watch your diet strictly at 70 years old, you may still get Diabetes. Then genetically, some people retain more sugar in their body, causing them to be diabetic at a younger age. Then again, if you are diabetic before 45, there is a good chance that it runs in your family.
We should watch our sugar intake but 50% of the causes are beyond our control. Therefore, our bros here with higher blood sugar SHOULD NOT avoid medications; strict dietary controls will not help much in the long run and without medications, you will end up getting more issues from higher blood, eg serious vision problems, vascular, diabetic foot, etc.
By and large, such things come with age.
Common medications include metformin, Lingagliptin, insulin etc and seriously not much side-effects. (If you take metformin for a few decades, you may get bloaded tummy, and doctor will offer alternatives).