WS, I’m not sure what you meant by locked in, but I think I understood it differently than what I assumed Joseph meant.
I thought you meant stuck in a marriage and society which she feels she doesn’t belong (bad), and that Joseph meant that she will retain her idealism and type of frumkeit, and be happy in her marriage (good).
I think both are possible, and there’s an upside and a downside to getting married soon after sem.