If she grows up with this thought process, she might be scarred for life and never be able to commit to someone for the fear of things going bad.
There are several factors that lead to the fear of commitment in women.
Women with commitment phobia never talk about the future because that means commitment.
They might get angry when future goals and the like are discussed. They do not like to come out into the open and admit their feelings because then they'll be vulnerable to getting hurt.
If a girl has closely observed a bad marriage or witnessed an abusive relationship which had instances of domestic violence, bitter fights and insulting words being hurled.
As a result, she might associate marriage or relationships as being bad, something that leads to a lot of pain. Knowing where she's coming from, like her and her family history and background might help understand the cause.