Except everyone does look their age.
I must admit, black people tend to look younger (for their age) than white people.
Make up your mind!
It's a fact that people look their age. People in their 60s look like people in their 60s, and people in their 70s look like people in their 70s, and so on and so on...
Well, clearly that is not the case. Some people in their 50s, c/- lifestyle - stress, smoking, sunbathing, drink, drugs, whatever - look in their 60s or 70s. Some people in their mid or late 60s look 80 and some look as if they are in their early 60s or late 50s. Some women age well without any so-called tweaks or injected substances whatsoever.
Perhaps your eyes are not attuned to the variations, but there are great variations of what a person of 50, 60, 70, 80, 90+ looks like, and it may not be similar to their chronological age. This is a recognised reality - biological age versus chronological age.