I think the real danger is not people who have diabetes because they monitor their diabetes several times per day but the many people out there who have it and are not aware of it.
Its a bit like people who wear glasses / contact lenses, people who wear glasses / contact lenses do so to correct their eyesight, they have annual eyesight tests and if their sight has deteriorated over the past 12 months its corrected again by stronger glasses. Now someone with (alledgedly) ‘Normal eyesight’ has their eyes tested every 5yrs when they renew their licence.
So in real terms someone who does not test for diabetes or indeed their eyesight surely is a greater risk?