Women who scored low marks in School & UG/PG, how did you convince your parents to let you to pursue your career

When I was going through a post in another community , I wanted to ask this question.

In India in 80% of the families parents want their girls to marry within 25 and especially do not give importance to their career compared to marriage.

For girls who are toppers and showed signs of intelligence in school/UG it would have been relatively easier (Not easy, depends on the family but easier) to convince their parents as they have seen evidence of that success.

But for girls who couldn't score big marks or couldn't prove they were intelligent or talented how did you convince your parents to let you focus on building a career. How hard did you fight for it and what all did you do?