They make their living based on their looks.
Who can blame them for trying to protect their best asset?
I think it doesn't work that well, but at least I understand their motive.
I understand their motive, but it is a mostly Hollywood thing. If you look at most actors and actresses in the UK, for example, they don't do it, or at least not, so far, to the extent they do in Hollywood. These Hollywood people really look like freaks, and that is just in photos. When you see them in person, it's even worse. An actor or actress should be concerned with how well they can act, not how they look. Those who are the best actors are the ones who keep working. Look at Betty White. I doubt she has ever had plastic surgery. She relies on her talent and ability to get work, not on her looks.
But, anyway, my point, which you seemed have missed because of a knee jerk reaction to the OP, is that these folks present a negative picture of plastic surgery: that is, it does not encourage one to get it based on most of the results you see in these Hollywood actors, who can affort the best plastic surgeons there are. That was the point of the OP, not to put the actors down. You missed the point of the OP.