This question has many answers because people are so different all over the world. Children see death as far, far away and that is quite normal and good. Life is to enjoy.
Some babies are born deformed, or with a disability, some severe, some mild and some with an intellectual disability, many of those die early. Most babies are born OK.
Others get killed in motor car accidents or collisions. Others are murdered, some are even poisoned because they tell too much of things they should not tell – like exposing corruption.
Many are killed in wars. Nobody wins in wars – except the makers of guns, bombs, rifles and so on. But most wars are planned to achieve certain gains, or profits for big organisations. I kid you not!
Others die because they: ”Dig their own grave with a knife and fork”. They eat too much, get very fat, get sick and die younger. Others smoke and drink too much.
But the Bible says ”..a man’s life is 70 years; 80 if he is fortunate.” It is normal to die between 80 and 100 years and that’s how God planned it. Then we can go to heaven to be with God for ever and ever – if we choose to. Moses has been there for 3,000 years! The 12 disciples for 2,000 years.
Heaven is not compulsory – you can choose to go where God is not if you care to – with people who are the same. This writer, ‘The Answerer,’ is looking forward to dying (but I don’t want to be there when it happens – it might hurt). Truly, 39 years in a wheelchair, and over 80 years old,- I really have had enough (in a nice way). My Mum got to be 100 years. She said to me once: “Oh Peter, I’m so tired, I would just like to go to sleep and not wake up.” She did, at 100 years plus 3 months. She's in heaven now.
I have only heard of a few older people who want to get to 150 or more. I reckon they had no nagging sickness, plenty of money, and never stopped to see the poverty, sickness, and pain that many people have to live with every day.