Not necessarily. If she was an anxious gemini she’d be more likely to fall for leo men. She could either:
Now recognize the red flags of scorpio and not subject herself to that.
Be unaware of the red flags of cancer and keep making the same mistake
Recently left a long term relationship as an secure individual and discover how many gemini really exist.
Of course you are right, she could be gemni, in which case hopefully she’ll learn sooner rather than later that fearing intimacy and vulnerability is detrimental, and that healthy codependency is actually a thing. But it’s not easy for them to do so.
I don’t like to think that everyone is incapable of finding someone, people just need to figure out why. Pointing out “single for a reason” seems counterproductive and a bit disrespectful.