Yeah, I mean life expectancy has made great strides in the past 100 odd years worldwide; what we see is a higher occurrence on things like cancer and heart disease or other diseases that become more and more likely with age. There's the pressure on the health care / social systems as well, which is partially compensated now by having people work longer - either by raising the retirement age, or having no state pension so that the elderly are forced to keep working for longer.

But your point also stands, treatments like this, IF they become commonplace, may have far-reaching effects that we can't oversee yet.