Age itself doesn't really matter but I think having birth and death dates listed is really important because it tells you: 1) If the person is still living and

Age itself doesn't really matter but I think having birth and death dates listed is really important because it tells you: 1) If the person is still living and 2) what era they lived in. Listing the age is just a natural byproduct of having the other two pieces of information and if it wasn't included conveniently in a box, could be easily calculated. I do agree that society in general puts a strange emphasis on age, as if whether someone is 30 years old matters vs someone who is 60. The only case where it's really relevant is that if they're living especially long, but then that would be mentioned in the article anyway.