Just to express an opinion from a slightly different angle... I had been qualified as a nurse for about 8 years when I was diagnosed with type 1 diabetes aged 30 years, and had cared for a few people with diabetes during my career, but hadn't done any nursing for over 1 year before diagnosis, and had only been working part time for 5 years before that, in all departments / wards etc, as I was trying to make a career with my newly acquired BSc Marine Biology. Things had moved on between my last experience of caring for anyone with diabetes and my own diagnosis, so I relied on the diabetes specialist nurse - and was sorely disappointed. I'd seen excellent specialist nurses in other fields, eg stoma care, breast care, children with tracheostomies, so, not unreasonably, expected straight answers to at least some of my questions, not, for example, a laugh, when I asked if I'd have to stay in hospital to start on insulin. I hadn't heard of basal bolus insulin regimes, so didn't know any different when I was put on bimodal insulin without any discussion about what would suit me. When I got some information from a pharmacist friend in Tasmania, I asked about changing, and things began to improve. As this was 1996, there was very little internet / email (basically only academics had email addresses), so I didn't have much opportunity to resarch myself, except by writing to insulin and blood glucose testing companies for information about their products.
These days, diabetes having made using Marine Biology degree even more difficult than before, I've had to go back into nursing, researching, and hopefully not being one of the very few ignorant / unfeeling nurses - but remember, diabetes is just one of many conditions, from the very common to the very rare, that nurses and medical professionals need to understand.