It is Christ we are receiving in the Eucharist. Taking Him from an EEM doesn't lessen His Presence nor the graces one receives.
Receiving him in an envelope in the mail wouldn't lessen his Presence or the graces either. Why don't we just order him up online and have Fed Ex or UPS or the USPS handle it? If there's no priest, then why bother going to a stupid "communion" service? It's not Mass. We can save a lot of time and useless overhead that way. In fact, a priest could be the one who distributes to thousands that way. Then, like Netflix you could just drop the envelope back into the mail.
Communion by FedEx is improper because it violates the principle of personal transmission. For example, confession to a priest over the phone is invalid, not because the priest is any less a priest when he's listening on the phone, but because electronic transmission violates the personal principle that is the key to understanding the Church's sacramental ministry.