It is terrible to think of these things, but to be honest it was one of the first things that went through my mind when i was in the hospital after diagnosis - "How Long will I live!?"
Well, on AVERAGE diabetics lead shorter lives. Thats a fact. BUT the key there is AVERAGE. Some T1D do not take very good care of themselves, some do, and some are meticulous about it, so this averages it out. So if you look at the stats that say "T1D live 7 years less" (i think its something like 7 or 5 years now) well, thats the AVERAGE T1D. So to get a longer life you just have to be above average in your care and you will be totally fine!
Also you have to look at life expectancy in the first place is based on the AVERAGE human - this person probably smokes a bit, drinks a bit, is a little overweight, doesn't exercise much, and doesn't really watch what they eat. So if you can be an above average human, and an above average T1D you should live a long full life.
Also - I am not sure if this helps but it also matters how long you have been living with T1D, diagnosis at 3 will lead to a different expectancy they at 30, not that its always a huge difference, but again stats are typically easiest to present as an 'average'
The take away here - We need to be above average to break even. We need to watch what we eat, stop smoking, exercise more then the neighbours, manage stress better then our friends, and make the most out all of our days in hopes that we will see many many more.
We can do this! But if we can't - Those stats are all old lol There is no possible way they can accurately predict when someone currently living is going to die unless you are already showing some major signs. They are all guesses based on how old people with T1D are now when they die - but that means they were diagnosed waaaay back when. So they guess and every year they update these numbers the gap closes. So i think by the time we are getting close to it being a reality it will so close it won't even be worth thinking about lol