Various hacks will tell you to marry in your early 20s because that's supposedly when women are at their most attractive. They will even subtly encourage you to not focus on your career and to ditz your education for the sake of a man, as men don't care about your career.

While it's true that men don't care about women's careers, since they're shallow and only care about looks, it's still a bad idea to focus on a man instead of focusing on your career. Let me explain why.

People who marry early actually have a higher chance of getting divorced. Despite what some tell you, getting married in your early 20s might be a recipe for disaster.

https://www.telegraph.co.uk/news/uknews/8331027/Couples-who-marry-young-are-most-likely-to-divorce.html

http://maselliwarren.com/2014/03/20/divorce-rates-increase-youre-25/

People who are not well-educated have a higher chance of divorce. Just one more reason to focus on your education.

https://www.researchgate.net/publication/265421697_Less_Education_More_Divorce_Explaining_the_Inverse_Relationship_Between_Women's_Education_and_Divorce

Being economically dependent on a man leaves you in a vulnerable position. Expecting a man to provide for you leaves you in a vulnerable position. What will you do if the man abuses you and you have no education and no job so can't get out of there? Don't believe the fools who say that you can just divorce and get alimony. Its not always that easy. There are many who find ways to avoid paying alimony.

Even if you don't find a man, you can still be happy. Remember that marriage is a better deal for men than for women anyway. https://www.psychologytoday.com/us/blog/insight-therapy/201510/is-marriage-worth-the-trouble-women