I think you're exactly my age Butterbear. The same age as a very dear friend of mine who is also T1. I certainly wouldn't want her thinking like you. And I'd be very stern with her if I thought that she was.
First, you are as deserving of treatment as anyone else. Yes, your level of risk is a bit higher, but your chances of survival are well over 90%! So you're definitely not a write off. (Especially because that figure hasn't even been adjusted for age or other health complaints, like the ones that often accompany T2, which you presumably don't have. All us 'normal people are telling ourselves it only happens to the elderly and infirm, so why shouldn't you?)
Second, they are not talking about not treating people at all. Even if they are dealing with a huge influx of people. There might not be enough intensive care beds or ventilators, and that's where terribly difficult decisions might have to be made. But as a diabetic you have other concerns. If your blood glucose starts going crazy due to illness, then a hospital will be able to treat you for that. And they will.
Asking your DH to just leave you in the spare bedroom to die of a hypo or hyper, or ketoacidosis, because of some bizarre notion that nobody would spare the time to hook you up to some glucose or give you a shot of insulin is daft and unfair. Stop it.
But I'm sorry you're so scared. It's horrible. Take care of yourself. Test regularly. Make sure your kit is full. I'm sure you're already in isolation, but make sure you're contacting family and friends via message, phone and video call. Do other nice things. Anything creative you've been wishing you had time for? It's spring, can you plant a flower and watch it grow? We could well be in this for the long haul, but the odds are in your favour.