I wouldn't say it's just vanity. Anymore than its vanity that makes us wash or get our hair done, clean our shoes or think about what we are wearing. A lot of women in the public eye have work done because otherwise they wouldn't get a job, or would maybe lose the job they had, or maybe they think they would. For many complex reasons we tend to find younger looking people more attractive than older looking people, maybe it's a basic evolutionary behaviour, maybe we should rise above it and say we don't care how we look, but many of us do care about how we look and try to make the best of our diminishing assets. Maybe we should just give up, but why should we? I'm not saying we should all aim to look young, just look the best we can, and for some people that may include face lifts, Botox etc. it's up to them surely.