I mean sure, but only if all other health problems are also solved, not to mention society which is already struggling under the pressure of an aging population - causing retirement ages to increase, employment under elderly increasing, and health care systems like the NHS or the US system to crumble to the point of people dying while waiting to be seen by a GP or being referred to A&E to sit and wait for hours waiting for underpaid and overworked staff for something a GP should be looking at.
The health problems that kill the most people are consequences of aging. People in their twenties have only about a one in a thousand chance of dying each year, and a lot of those deaths are avoidable. Avoid dangerous drugs, live in a safe area, and take public transport, and you'll likely live for thousands of years if you maintain the biology of a 25-year-old. (Sources in another comment I posted here.)
If that were an option, I'd be happy to forgo social security. If everyone were biologically young, there'd be a lot less for a healthcare system to do.
