My sister got married when she was 16. No, she was not pregnant. Her husband was 20. She finished high school, he got a good job and has been there for over 35 years. She had her first child at 18 and her second at 22. She has a good job. They are solidly middle class, enjoy great vacations, have investments, own a home and should have a nice retirement. They have been married 40 years. The American Dream worked for them even though they married very young.
I’ve known people who have married and had children young. It doesn’t mean they’re not going to be successful. Although there are individual exceptions, overall the key point is getting is getting married before having children.