Also that's only true for a narrow subset of people working in "rockstar" industries where the career decline is sharp after 30. Footballers, pop stars, models,
some programmers. Everyone else expects to make more as they get older. Some industries (e.g. acturaries, medical) have really long qualification processes so you will only reach full pay after 30.
It might be "peak savings opportunity because you don't have a family", but that's not at all the same thing.
