I like this practice a lot. In fact, though a Latin-rite Catholic I wrote a letter my Bishop to allow my daughter to be baptized/confirmed/communed at the same time. He refused on the grounds that it was “against tradition.” I had to wonder which tradition he was talking about, since the Eastern practice follows the oldest, and remains the longest-lasting, tradition regarding the administration of sacraments to children.
Personally, I feel that the refusal to administer the sacraments other than baptism to children is a double-standard in relation to life. On the one hand, the Church that all human life is precious and fully human, regardless of its age or physical or mental status - when it comes to abortion, euthanasia, etc. - but on the other hand, we claim that children aren’t human enough (lacking the capacity to reason) to receive the sacraments. And what about mentally disabled children and adults, who never achieve “reason”? It just doesn’t make any sense.
The refusal to confirm and commune children also creates a double-standard with regard to the sacraments themselves. Is the Eucharist real, and does it matter, or not? Because if it’s real, how is it that children, baptized and incapable of sin, could possibly derive no benefit from it? If it matters, why in heaven’s name would we withhold those graces from them?
My pastor once told me it’s his job to protect the sacraments. I suppose that true enough. But - what is he protecting them from? He doesn’t protect the Eucharist from adults who receive in mortal sin, or who don’t discern the Real Presence. The Church says children are incapable of mortal sin, and without the capacity to reason they haven’t rejected the Real Presence. So… it’s more dishonoring to God to allow actually, completely sinless (baptized) infants to receive than improperly disposed adults?
The only argument I’ve seen to justify the Roman Church’s position on children and sacraments without contradicting doctrine is the good old-fashioned, “Because I said so.” I am not satisfied with that, but I’m also aware it’s not going to change.