Living with someone who can die anytime

My das has diabetes and hypertension, so he has to take care of his health and manage his pressure and glucose to yk not die, but for some fucking reason he appears to not care enough about his life?? Because he's constantly not gonna eat or take wayy too much insuline so he starts acting erratic during the early morning due to the low oxygen in his brain and it's such a unnerving experience, because we have to take care of him, trying to make him eat or drink something with sugar on it otherwise he will literally DIE, and the worst part is that he's really stubborn and sometimes insists he's ok when clearly he's not, that really wouldn't be a problem if when he's fine he TOOK CARE OF HIS HEALTH.

Last week my mom woke me up during the morning because my dad was acting erratic and my mom said he was getting BLACK, she got so desperate I think she genuinely thought he was gonna die that day, I tried calling the ambulance, it was really difficult because I just moved into a new house and i havent learned the address fully, but I was able to, I also called one of my sisters that live nearby to help, but the time the ambulance came he was already fine after my mom kept giving him water with sugar, and his glucose was back to normal, but the problem? His blood pressure was allarmingly high and he could have a heart attack! But instead of going to the hospital to avoid such a thing.. He decided to NOT GO TO IT? It's not like im America where you have to pay expensive bills no, it's free where I live! So they told him to stay home and do nothing but instead of listening to them HE DECIDED TO GO TO WORK? And it's not like he works for anyone no, he's self-employed! He just didn't wanna go because idk he just didn't feel like it, thanks god he was fine and nothing happened to him but it's so annoying having him neglect his health like that for seemingly no reason! And it's horrible because his neglect isn't only hurting himself it's hurting us! Deeply! I literally can't sleep peacefully because i'm always worried he's gonna die! It's making my anxiety so bad and everyone else's too! I still remember my mom screaming begging me to call someone, I never EVER wanna hear her desperate like that anymore in my entire life.

Idk if im being too harsh on my dad but cmon! Why cant he just not kill himself for a moment, we're already in a hard moment financially we can't affoard losing our main source of income, having to pay for funeral and you know.. Losing my dad gosh is it really that hard?