This misconception is common, but it isn’t harmless. Regardless of the facts, my friend’s mindset makes change impossible. When we assume we can’t, it’s guaranteed we won’t. It’s true that some of us are naturally more decisive, more laid back, or more confident than others. Some of us are more inclined to overthink. But that is the starting point, not the last word. That is where we begin, not where we’re destined to end up.
What does "That is where we begin, not where we’re destined to end up." mean?

Question

Answer

It means that the author thinks all women are created to do one thing. Once they get older though they or may not end up doing the one thing they were destined to do.