That is where faith comes into play and not even bothering with things that donโt concern you. Not everything is going to make sense to you as a laymen. Allah knows I too struggled with that, but ultimately as Muslims we hear and obey. Also what makes some topics confusing is the sheer amount of different opinions of different scholars and some Hadiths being weaker or stronger, so some things arenโt set in stone.There are too many hadiths in Islam and some of them don't make sense, this one must be one of those.. But anyway thank God we have DNA testing technology today.