You can find various explanations, and one that resonates with me is as follows: Jesus did not permit His body to be touched by a woman or a layperson, as was the case with Mary Magdalene. However, He allowed His body to be touched by a priest or bishop, namely St. Thomas. It's worth noting that St. Thomas had already received the fullness of the priesthood during the Last Supper.
In my view, this explanation is both fitting and in line with traditional practices of the Church, which hold significant importance in our contemporary times. Laypeople are generally not allowed to touch the Holy Sacrament. There are exceptions to this rule, such as in extreme cases like the danger of profanation or during periods of persecution when individuals may need to administer Holy Communion to the dying.
Typically, the consistent tradition of the Church, whether in the East or the West, dictates that only priests and bishops in the Extraordinary Form can handle the Holy hosts. Deacons, having not yet received their second ordination, are excluded from this practice. Thus, a fundamental distinction exists between those ordained through Sacramental Ordination and those in the common priesthood. This Gospel episode serves as an indication of this established tradition within the Church.
Dear visitors of Gloria Dei and all who have already written or who will write a personal message to me. I am grateful for your attention, your kindness, for your spiritual support and especially for your sacrifices and prayers for me. God may reward you!