Girls, How much truth is there to this theory regarding relationships?

So there's no real name for this theory, but long story short the general idea is that when it comes to a woman in a relationship, their desire for the 3 S's that being Safety, Security and Stability, will trump any feelings of sentimentality they may have for their SO.

No matter how much they may say they love them, or genuinely love them, the moment they feel their partner can't provide for them they will move on to someone else. Now what this limit is varies from person to person, and many women will even go out of their way to fix why their partner can't provide anymore. But unless the woman is self made and can take care of herself, if her partner can't protect her then what good is he to her anymore?

How much truth is there to this?

Girls, How much truth is there to this theory regarding relationships?
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