As we've just seen the courting bond is not permanent. If it works out "I just want to fuck her" is all it ever is, they call it quits, I imagine. So, yes, the same impetus causes that to happen, but that happens in real life. You don't want to spend the rest of your life with someone you don't find attractive. Relationships have to start somewhere, and most people go up and first talk to somebody because they think that person is cute.
The Amazon way is just more elaborate. From what I've seen it doesn't actually seem to work any differently.