The more data they have, the more accurate the picture. You may be underestimating how much we all change over the years. At 24 you know what your parents taught you and maybe have a degree. You probably aren’t married. You probably don’t have kids. You probably don’t have any diseases (that you know of).

At 30, maybe you’re married and they’re collecting information about that. At 35 you’ve changed careers and gained or lost a religion. Maybe you have children (now they’re adding info on your children). Maybe you’ve found out that you are diabetic or bipolar. Maybe you’ve had two car accidents. At 40 you’ve cast off a lot of the demands of your parents. Maybe you get divorced. Maybe you realize you’re gay or trans. Maybe you become invested in a different type of politics. Maybe you change careers again. Maybe the bipolar diagnosis gets removed as a misdiagnosis. Maybe now you’ve had cancer.

Imagine how much less they’d have on you (and your children) at 45 if you had cut them off at 24.