I really loathe the hubris of modern people who think we shouldn't die like everyone did for millennia before us. Yes, we live longer and we have better medicine, stop trying to live forever.
"you should be/keep slaves because our ancestors were/did"
etc.
Your logic is weird and false. There's nothing holy about dying.
Whether that's good or bad is a different question, but the point is getting rid of death is not a trivial thing. It would cause such huge changes in the human experience that I think we'd cease to be human and would become some other, different thing.
Immortality would be a neat trick but it can't solve war and it can't solve starvation.