I get tired of people misusing statistics.
In the age of Google, at least do a search before making a blanket statement without support, like physical maturity
The reason you have to watch players is the assumption that a player is going to follow a generalized curve assumes that there are no other variables but age involved
Physical peak is around age 26 for all athletes
Strength actually peaks in the mid-30s, Power much earlier
Peak depends on power v endurance
Performance peaks