That’s why commitment is the better word than fighting. In get the intent of the original statement and would agree, but its sort of a bumper sticker version of reality (to be fair, internet memes are essentially that).

To your point, both people need to view relationships in the same manner and value, and then commit to it. That’s where the power is. And no matter what, you know neither of you is giving up and leaving. Its foundational to everything.