It seems clear to me that eliminating the risk of death due to age alone is a very good idea.
Most of the life forms on this planet do not increase their risk of dying by aging. Indefinite life is the default mode of life for most organisms. It is only a few multicellular life forms that developed the trick of dying, and got a burst of evolution as a result.
That allowed for entities like us to evolve, and to develop mimetic evolution.
Now mimetic evolution requires that we extend life-spans indefinitely again. Unless we do so soon we are going to hit some deep limits on the sorts of complexity that we can explore.
So contrary to many others here, I see the emergence of indefinite life in humans as a return to the original life mode still used by all forms of bacteria, many plants, and a few animals.
Now most of the risk to humanity exists in the early phases of human development, when individuals live in binary worlds, of true and false, right and wrong.
Security requires a respect for life, particularly sapient life; and that requires an acceptance of diversity that is not a common feature of our societies.
So bring on life extension.
Bring on functional enhancements.
And let us make sure that before any of that, every individual on the planet has all the resources they need to do whatever they responsibly choose.