In Ketubot 40b the Gemara says that we see that the father gets his daughters (child) embarrassment and degradation payments from the fact that he can marry off his daughter to someone horrible, causing her embarrassment and degradation. Rashi seems to explain that its because he could marry her off to this guy.
But why is he allowed to, if this causes embarrassment and degradation? Shouldn't we say that technically he can marry her off except because of embarrassment and degradation? And why not just say it's the marriage itself to him causes the embarrassment?