I believe the majority of people are not as much influenced by the media, magazines, and celebrities as much as they are by people they actually know. In many instances they contrast where they are today compared to how (they) looked 20 years ago!
It also doesn't help that the government keeps lowering the BMI number which means more people now fall into the overweight/obese category.
Lastly there has been a push in America to pursue youthfulness and good health even through one's senior years. During previous eras you didn't see 50 and 60 year olds out jogging, mountain climbing, working out in gyms along with getting plastic surgery work done.
Sayings like "50 is (the new) 30" and a drop in AARP membership illustrates many people normally classified as "seniors" don't see themselves falling in the same category as their parents and grandparents did at that age. They're not embracing old age.
Online dating sites geared to ages 50 and over along with Viagra and other medications have caused people to expect stay active and young for life. Much like new mothers are expected to snap back into shape within a few weeks of giving birth.
Old photos of oneself often trigger current disappointment.