Yet even though it seems wrong, how come the Eastern Churches give all 3 Sacraments of Initiation( Baptism, Eucharist, Confirmation) on the same day to infants? From thereon, they can receive Eucharist for years before they make First Reconciliation. If its not OK in the Latin rite, why is it OK in the Eastern?
First, there is nothing ‘wrong’ about giving all three Sacraments together. If there was something wrong about it, the Church would not do it.
Secondly, a Catholic, of any Rite, cannot recieve the Eucharist if they are in a state of mortal sin. Nothing the Eastern Churches do violates this.
They provide the Holy Eucharist to infants and small children. Since these children are below the age of Reason, they are incabable of sinning. So there is nothing to prevent them from the reception of Holy Eucharist.
Once they achive the age of Reason (generally about 7) they, like all of us, would need to confess their sins and recieve absolution if they have commited grave sin.
That is the exact same standard that Latin Rite Catholics have. If you are about the age of Reason, and you desire to recieve the Holy Eucharist, you need to have recieved absolution.
Of course, many, if not most children, will not have commited grave sin. But there might be some who have it and it would do grave harm to their souls to receive the Eucharist under those conditions. We certainly cannot have their teacher or parents quizzing a child about sins they have, or have not, commited.
The only proper forum is the Confessional; a child should enter the confessional and confess their sins. The priest will then determine the severity of the sin and absolve and give a suitable penance.
This is true and required in every Rite.
BTW, adults who are recived into the Church via Baptism are given Communion that same day. They have no need to go to confession, as all their sins are absolved.
So the focus should be that when someone is admitted to Communion for the first time, that their soul should be free of stain of mortal sin. The Eastern Churches do that, and so do we.