I heard i believe from R’ Wallerstein that the luchos were like the kiddushin (i.e. ring) and if Mmoshe Rabbenu didnt break the luchos we would have so to speak been married with Hashem and committed adultery by sinning with the egel so it was a favor Moshe Rabenu did for us.
Well, wasn’t Moshe the shliach kabbala? So isn’t the kiddushin chal when he gets it?