2008, Nastia Liukin is 19 or 20 years old and wins gold after gold and is declared one of the greatest gymnasts ever. In 2012 she tries again at 23 or 24 years old. Everyone is sure she is still the greatest ever but she bombs.
2016, Simone Biles is 19 or 20 years old and wins gold after gold and is declared one of the greatest gymnasts ever. In 2020 she tries again at 23 or 24 years old. Everyone is sure she is still the greatest ever but she bombs.
See the pattern? In gymnastics, 24 year olds are geriatric.
Nonsense the greatest female gymnast Larisa Latynina did not begin her olympic career until she was 22 and competed in 3 olympics and there are 4 better female gymnast ahead of biles medal count that also competed in three sets of games so that theory fails. The fact is that Japan will not let biles use stimulants to improve her performance as this is not fair to the other athletes
