I don’t know whether she understood or not, but I’m pretty sure I did and I still agree with her, basically.
Not to take it quite so far as her particular analogy, but her point still stands. It’s impossible to say what could/could not have been if not for x and y and z. That’s why scientific experiments have controls, and there are no controls in life. This is a dangerous place to stand and wonder.
Until I personally reach meah ve’esrim and find out first hand about the cheshbonos, I don’t think that I myself will speculate.