[Celestia lifts one hand, palm up, in a gesture that faintly hints at being a shrug.]

I think the gods might be able to forge stronger connections if they wished... but consider that this ceremony is not rare or treated as anything special. If the powers that went into were so hopelessly binding as you fear, we would see its effects in the Near Shore, with numerous people bound inextricably together by its effects. I have seen enough of the humans here that I am confident that is not the case -- since I have Equestria to compare it to, where we have no gods at all, and in which ponykind lives life in ways that are at heart identical to humans here.