It's absolutely a good thing. We need some of our cells to die as our tissues develop, society needs people to die in order to develop. A society without death would be a stagnant hell.
The problem is that in a world without aging and natural death, your racist great-great-grandparents have (effectively) all of the resources and power, and therefore no reason to listen to you at all.
Yes, this is a pessimistic viewpoint, but I think it's also a realistic one.
I think it's an incredibly pessimistic view of humanity to suggest social change can only come about through death.
Moreover, I think this argument tends to come solely from people trying to excuse death, rather than any kind of reasonable analysis.