Does that reply means that nothing happens when you take and eat the bread and take and drink the liquid in the cup?
Holy communion is with Christ's Holy Spirit. As Jesus said I in you and you in me.
The holy communion is supping with Christ and therefore the Transubstantiation happens in the believer who takes part in it.
The bread and the wine are not the focus of Christ, the focus of Christ is us who take part in him.
Therefore the power that transforms the believer in the body of Christ is not the priest who says that God does this with bread and wine, but rather we the believers are the bread and the wine in spiritual marriage with Christ.
It is us who are given to Christ in communion / community / family. One spiritual body in Christ the living vine.
The priest praying in order for the bread and wine to be transformed by God makes the priest somehow empowered indirectly in this communion when the priest is not the third person, but rather it is solely between God and man, and the priest too is a faithful taking part in Christ.
The transformation happens in the priest and the believer and a priest is not needed to sanction a communion, it could be a group of followers in Christ who under the presence of the Holy Ghost are all partaking in being transformed body and soul to be spiritually one with Christ as the bride of Christ.
Therefore the Transubstantiation happens to the faithful by the hand of the Holy Ghost who turns us into good tasting wine. The believer is the wine and Christ works in the believer to transform him into a good tasting wine as was depicted in the miracle of the wedding.