It certainly can if it is poorly managed.
Type 1 diabetes is still treated with insulin. There hasn't really been a medical break through that has been able to change that. One change is the insulin pump. Instead of taking multiple injections each day, a type 1 diabetic might make the choice to use an insulin pump to make managing taking their medication much easier. Correct use of the pump could help keep sugar levels better maintained than injections. So, the pump can make it easier than it was in the past.
My husband is a type 2 diabetic. During one of his appointments, the doctor (who was an older man), mentioned that in the past, it was believed that anything below 200 was considered "managed" but that further research revealed that even at levels of 200, over time, some damage was occurring. This means that under current standards, doctors are encouraging their diabetic patients to maintain lower sugar averages than what they might have done in the distant past. Someone developing type 1 diabetes now has a better chance of long term management than someone who developed it 50 years ago because the doctors have a better understanding of what levels are causing damage and what levels are actually safest. This means doctors are also doing a better job of helping their diabetic patients stay healthier and have a longer life.